2484405domain: NAppears in sequencesG.f. satisfies: A(A(x)) = Sum_{n>=1} a(n)*x^n * Product_{k=1..n} (1 + k*x), where g.f. A(x) = Sum_{n>=1} a(n)*x^n.at n=8A193207Number of (n+2)X(4+2) 0..1 arrays with each 3X3 subblock having clockwise perimeter pattern 00000001 or 00000011.at n=15A259719