284075domain: NAppears in sequencesa(n) = n*(4*n^6 + 70*n^4 + 196*n^2 + 45)/315.at n=11A099193Crystal ball sequence for the lattice C_7.at n=5A305721Expansion of Sum_{k>=1} mu(k)*log(1 + x^k/(1 - x^k)^3)/k.at n=40A308290Product_{n>=1} (1 + a(n) * x^n) = 1 + Sum_{n>=1} (n * (n + 1) / 2) * x^n.at n=40A359407