Odd coefficients in Sum_{n>=0} x^n * (1 + x^n)^n / (1 - x^(n+1))^(n+1).
A325047
Odd coefficients in Sum_{n>=0} x^n * (1 + x^n)^n / (1 - x^(n+1))^(n+1).
Terms
- a(0) =1a(1) =3a(2) =9a(3) =27a(4) =99a(5) =657a(6) =4109a(7) =14423a(8) =53475a(9) =134523a(10) =1686983a(11) =13421711a(12) =85848955a(13) =325004679a(14) =1482972731a(15) =6258674687a(16) =43509358107a(17) =310036393025
External references
- oeis: A325047