Coefficient of x^n in 1/(n+1) * (1 + x - n*x^2)^(n+1).
A307947
Coefficient of x^n in 1/(n+1) * (1 + x - n*x^2)^(n+1).
Terms
- a(0) =1a(1) =1a(2) =-1a(3) =-8a(4) =9a(5) =201a(6) =-89a(7) =-8721a(8) =-5599a(9) =540595a(10) =1091551a(11) =-43580206a(12) =-159753527a(13) =4318835223a(14) =24185472039a(15) =-506659112324
External references
- oeis: A307947