Coefficient of x^n in the expansion of 1 / ( (1-x) * (1-x-x^2) )^(2*n).
A372460
Coefficient of x^n in the expansion of 1 / ( (1-x) * (1-x-x^2) )^(2*n).
Terms
- a(0) =1a(1) =4a(2) =40a(3) =442a(4) =5136a(5) =61424a(6) =748462a(7) =9240480a(8) =115194720a(9) =1446820588a(10) =18279806600a(11) =232071505120
External references
- oeis: A372460