Latest Tools

This tool lets you generate any number of Thue-Morse terms and see the output live. The sequence is built by calculating the parity of 1s in the binary form of…

This tool generates Baum-Sweet Numbers up to any count you choose. These values are binary-based: for each non-negative integer, the tool checks the binary string for blocks of zeros and…

This tool creates Rudin-Shapiro Numbers based on the count you enter. It uses each number’s binary form to decide the output. The moment you change the input or toggle a…

This tool creates the Gijswijt sequence based on your input count. You control how the results appear with options to add index numbers and switch between line-by-line or inline formatting.…

Use this tool to create a custom list of Stanley Numbers. You decide how many values to generate, whether to display them line-by-line, and if each number should include its…

This tool creates a Kolakoski sequence based on your preferences. You choose how many terms you want, whether to display the sequence line-by-line or inline, and whether to start with…

Use this tool to quickly generate a list of Moser de Bruijn Numbers with custom output formatting. You can toggle whether to include zero, switch between line-by-line or inline output,…

The Lucas Prime Test tool checks whether numbers are both part of the Lucas sequence and also prime. A Lucas number is part of a sequence that starts with 2…

The Generate Lucas Primes tool filters prime numbers from the Lucas sequence. Starting with 2 and 1, Lucas numbers grow with the same recurrence as Fibonacci numbers (Lₙ = Lₙ₋₁…

The Generate Negalucas Numbers tool calculates the first N values of the Negalucas sequence using a reversed recurrence. Unlike standard Lucas numbers, the Negalucas sequence uses alternating signs. It starts…

Construct Pentanacci Words creates a sequence of strings based on five initial inputs. Like the Pentanacci number sequence, each new word is generated by combining the previous five in reverse.…

The Construct Tetranacci Words tool generates strings using a recursive pattern based on four starting words. Each new word is formed by concatenating the last four in reverse order, creating…

The Construct Tribonacci Words tool lets you build a sequence of strings using a Tribonacci-style pattern. Starting with three initial words, each new word is formed by concatenating the previous…

The Construct Fibonacci Words tool creates a sequence of strings by combining words the same way Fibonacci numbers are built. You start with two words, like “A, B,” and the…

The Fibonacci Prime Test checks if numbers are both Fibonacci and prime. Just paste your numbers or import them from a file, and the tool instantly shows you which ones…

The Fibonacci Number Test helps you quickly check whether a list of numbers are part of the Fibonacci sequence. Just paste or import a list, and the tool will flag…

Need a sequence that goes below zero? The Generate Negafibonacci Numbers tool creates symmetrical Fibonacci sequences that include negative indices. Unlike the regular Fibonacci series, the Negafibonacci version mirrors backward…

Working with Roman numerals like XIV, XL, or MMMCMXCIX? The Convert a Roman Number to Regular Number tool helps you turn them back into plain integers instantly. Whether you’re decoding…

Want to change regular numbers into classic Roman numerals? The Convert a Number to Roman Number tool does that in real time. Whether you’re working with 1, 44, or even…

Have a list of ordinals like 1st, 21st, or 111th and want to turn them back into plain numbers? The Convert an Ordinal to a Number tool handles that instantly…