1721671domain: NAppears in sequencesNumber of nX6 0..1 arrays with every element equal to 0, 2, 3, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=8A303240E.g.f. A(x) satisfies: A(x) = 2 * x / (exp(A(x)) * (2 + A(x))).at n=6A334262