217554domain: NAppears in sequencesExpansion of g.f. Product_{k >= 1} (1 - x^k)^(-k*(k+1)/2).at n=16A000294Number of (n+2) X (2+2) 0..1 arrays with no 3 x 3 subblock diagonal sum 1 and no antidiagonal sum 1 and no row sum 0 or 1 and no column sum 0 or 1.at n=8A255153