Coefficient of x^4 in expansion of (x+1) * (x+4) * ... * (x+3*n-2).
A382985
Coefficient of x^4 in expansion of (x+1) * (x+4) * ... * (x+3*n-2).
Terms
- a(0) =0a(1) =0a(2) =0a(3) =0a(4) =1a(5) =35a(6) =1005a(7) =28700a(8) =859369a(9) =27458613a(10) =941164860a(11) =34617398640
External references
- oeis: A382985