50827

Appears in sequences

• E.g.f. satisfies A(x) = 1 + x*exp(x*A(x)).at n=7A161631
• Eight rooks and one berserker on a 3 X 3 chessboard. G.f.: (1 + 3*x)/(1 - 4*x - 3*x^2 + 6*x^3).at n=7A180147