53556domain: NAppears in sequencesNumber of Othello shapes with unique realization at the end of the n-th ply.at n=8A125529a(n) = 2^n - 1 written backwards.at n=16A273092Expansion of e.g.f. 1/(1 - x*(1 + x)*exp(x)).at n=6A308861Number of nonnegative solutions to (x_1)^2 + (x_2)^2 + ... + (x_8)^2 <= n.at n=29A341403