80658

Appears in sequences

• Number of distinct lines passing through at least two points in a triangular grid of side n.at n=32A244504
• Indices of Ulam prime triples, where u(k), u(k+1) and u(k+2) are all primes, and u(k) = A002858(k) are the Ulam numbers.at n=26A307330
• Numbers of the form k^2 + 2 that are the sums of two squares.at n=25A329170