350544domain: NAppears in sequencesExpansion of e.g.f. sec(exp(x)*log(x+1)).at n=9A012279Number of nX3 0..1 arrays with every element equal to 0, 1, 2, 5 or 6 horizontally, diagonally or antidiagonally adjacent elements, with upper left element zero.at n=9A303177