19677729

Appears in sequences

• G.f. A(x) satisfies: A(x) = x * Product_{k>=1} (1 + k*A(x^k)).at n=20A308372
• Number of nX6 0..1 arrays with every element unequal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=6A320407
• Number of nX7 0..1 arrays with every element unequal to 0, 1, 2, 4 or 5 horizontally, vertically or antidiagonally adjacent elements, with upper left element zero.at n=5A320408