266497domain: NAppears in sequencesa(n) = 1 + n^4 + n^6 + n^9.at n=3A123657Number of n X 4 nonnegative integer arrays with upper left 0 and lower right its king-move distance away minus 2 and every value increasing by 0 or 1 with every step right, diagonally se or down.at n=10A252979