65804544domain: NAppears in sequencesOne quarter the number of n X 5 1..4 arrays with no two neighbors of any element equal to each other.at n=13A183357v(n+1)/v(n), where v=A203752.at n=6A203753v(n+1)/v(n), where v=A203763.at n=6A203764Integers k such that both k and k^3-1 are the sum of two positive cubes (see A003325).at n=9A271717