61171

Appears in sequences

• Number of partitions into non-integral powers.at n=15A000345
• Quasi-Carmichael numbers to base -9: squarefree composites n such that prime p|n ==> p+9|n+9.at n=4A029569
• Number of inequivalent ways (mod D_4) three checkers can be placed on an n X n board.at n=11A082966
• a(n) = a(n-1) + a(n-2) + a(n-3); a(0) = -1, a(1) = 2, a(2) = 2.at n=19A100683
• Row sums of triangular matrix A105540, in which column n equals A105540^(n+1) when flattened as read by rows.at n=22A105541
• The sum of the numbers that are inside the contour of an n-story Christmas tree drawn at the top of the numerical pyramid containing the positive integers in natural order.at n=10A358994