5200313

Appears in sequences

• a(n) is the coefficient of x^n*y^n/n in log( Product_{n>=1} 1/(1 - x^(2*n-1) - y^(2*n-1)) ), for n >= 1.at n=12A322187
• a(n) = coefficient of x^n*y^n/n in Sum_{n>=1} -log(1 - (x^n + y^n)), for n >= 1.at n=12A322203
• a(n) = n * Sum_{d|n} binomial(d+n-1,n)/d.at n=12A343549