119288domain: NAppears in sequencesa(n) = Sum_{k=0..n-1} sigma(2k+1)*sigma_3(n-k).at n=14A081860Number of 5-tuples (v1,v2,v3,v4,v5) of nonnegative integers less than n such that v1 <= v5, v2 <= v5, v2 <= v4 and v3 <= v4.at n=14A085461a(n) = 4*n^3 + 4*n.at n=31A105374a(n) = 441*n^2 - 488*n + 135.at n=16A157730