Number Tools

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…