494080domain: NAppears in sequencesNumber of permutations of length n with 1 fixed and 1 reflected point.at n=10A007016Wiener index of the n-folded cube graph.at n=8A292029Expansion of Product_{i>=1, j>=1} (1 + i*j*x^(i*j)).at n=19A318416G.f.: Sum_{k>=0} x^(k^2) * Product_{j=1..k} 1/(1 - x^j)^3.at n=36A376709