241920000domain: NAppears in sequencesa(n) = (n+1)^3*(n+2)^2*(n+5).at n=23A109116Number of ways to place n nonattacking nightriders on an n X n toroidal board.at n=14A190393E.g.f. A(x) satisfies A(x) = exp( x^2*A(x)^2 * (1+x*A(x))^2 ).at n=9A387992