251595971

Appears in sequences

• a(n) = [x^(n*(n+2))] Sum_{m>=0} x^m * (1 - x^(m+1))^m / (1 + x^(m+1))^(m+1).at n=12A323696
• a(n) = [x^(n*(n+2))] Sum_{m>=0} x^m * (x^(m+1) + i)^m / (1 + i*x^(m+1))^(m+1), for n >= 0.at n=12A324303