Coefficient of x^n in the expansion of 1 / ( (1-x) * (1-x-x^3) )^(2*n).
A372461
Coefficient of x^n in the expansion of 1 / ( (1-x) * (1-x-x^3) )^(2*n).
Terms
- a(0) =1a(1) =4a(2) =36a(3) =370a(4) =4012a(5) =44814a(6) =510198a(7) =5886206a(8) =68579020a(9) =805045276a(10) =9507007686a(11) =112817021332
External references
- oeis: A372461