194842domain: NAppears in sequencesNumber of n X n 0..4 arrays with each element equal to the number of its horizontal and vertical neighbors equal to 2.at n=8A197055G.f.: Sum_{k>=1} x^(2*k-1)/(1+x^(2*k-1)) * Product_{k>=1} (1+x^k)/(1-x^k).at n=31A305124