147952domain: NAppears in sequencesNumber of 6-step self-avoiding walks on an n X n square summed over all starting positions.at n=24A188151Square array A(i,j), i >= 0, j >= 0, read by antidiagonals: A(i,j) = Sum_{|X|=0..i} Sum_{|Y|=0..i} Product_{k=1..j} (1+X(k)+Y(k)), where X and Y are multi-indices of length j.at n=40A358628