205933

Appears in sequences

• Numbers k such that 2^k - k^2 is prime.at n=33A072180
• Number of connected graphs with loops (symmetric relations) on n unlabeled vertices with at most n edges.at n=15A369289
• All integers k that can produce a closed walk in an equilateral triangular lattice via noncongruent primitive k-length diagonals, in ascending order.at n=11A387031