Square Triangular Number Calculator

m² = k(k+1)/2

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About Square Triangular Number Calculator

A square triangular number calculator finding numbers that are simultaneously square (m²) and triangular (k(k+1)/2). Uses the Pell equation x²−2y²=1. Known sequence: 1,36,1225,41616... Shows both m and k values. Client-side.

Square Triangular Number Calculator Features

  • Generate sequence
  • Check number
  • m and k values
  • Pell connection
  • Table

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