156244

Appears in sequences

• Number of n X 2 binary arrays with some element plus some horizontally, vertically or antidiagonally adjacent neighbor totalling two exactly once.at n=12A268783
• Discriminants of totally real cubic fields with 3 associated nonconjugate fields.at n=37A329787
• G.f. satisfies A(x) = exp( Sum_{k>=1} (-1)^(k+1) * (2^k + A(x^k)) * x^k/k ).at n=11A363542