241665domain: NAppears in sequencesG.f. A(x) satisfies: A( x - A(x)^3 ) = x+x^3 - A(x)^3.at n=7A216171Number of nX4 0..1 arrays with every element equal to 0, 1, 4 or 5 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=18A302511