Coefficient of x^3 in expansion of (x+1) * (x+4) * ... * (x+3*n-2).
A382984
Coefficient of x^3 in expansion of (x+1) * (x+4) * ... * (x+3*n-2).
Terms
- a(0) =0a(1) =0a(2) =0a(3) =1a(4) =22a(5) =445a(6) =9605a(7) =227969a(8) =5974388a(9) =172323696a(10) =5441287980a(11) =187011672276
External references
- oeis: A382984