49011domain: NAppears in sequencesa(n) = (2*n - 11)*n^2.at n=31A015245Numbers k such that sigma(k^2+1) is a perfect square.at n=18A067465Row sums of triangle A175009.at n=33A175006Number of (w,x,y) with all terms in {0,...,n} and w != min(|w-x|, |x-y|).at n=36A213499