Coefficient of x^n in the expansion of ( (1+x)^2 * (1+x+x^2)^3 )^n.
A370172
Coefficient of x^n in the expansion of ( (1+x)^2 * (1+x+x^2)^3 )^n.
Terms
- a(0) =1a(1) =5a(2) =51a(3) =581a(4) =6963a(5) =85905a(6) =1079943a(7) =13756216a(8) =176939187a(9) =2292988919a(10) =29892396451a(11) =391576960230
External references
- oeis: A370172