38171

Appears in sequences

• Quartering a 2n X 2n chessboard (reference A257952) considering only the 90-deg rotationally symmetric results (omitting results with only 180-deg symmetry).at n=4A064941
• Number of arrays of -5..5 integers x(1..n) with every x(i) in a subsequence of length 1 or 2 with sum zero.at n=7A193645
• Numbers k such that (134*10^k + 7)/3 is prime.at n=23A282975