36675domain: NAppears in sequencesExpansion of (4 + 15*x - 35*x^2 + 20*x^3 - 2*x^5)/(1 - x)^5.at n=21A257600a(n) = (n^4 + 20*n^3 + 125*n^2 + 250*n + 24)/12.at n=21A257601Number of n X 3 0..1 arrays with every element equal to 1, 3, 4, 5, 7 or 8 king-move adjacent elements, with upper left element zero.at n=12A299583