80991

Appears in sequences

• Number of n X 2 0,1 arrays indicating 2 X 2 subblocks of some larger (n+1) X 3 binary array having a sum of two or less, with rows and columns of the latter in lexicographically nondecreasing order.at n=34A227259
• Number of permutations p of [n] such that p(i) > p(i+1) iff i == 0 (mod 6).at n=14A250283
• Expansion of 1/(1 + 1/(1 - x) - Product_{k>=1} (1 + x^k)).at n=25A317536