144360

Appears in sequences

• a(n) = 361*n^2 - 2*n.at n=19A158307
• G.f.: 2*q * Product_{n>=1} (1 + q^(2*n))/((1 + q^n)*(1 + q^(2*n-1))*(1 + q^(4*n))) in powers of q.at n=42A293132