a(n) = [x^n] Product_{k=0..n} (1 + (3*n+k)*x).
A382349
a(n) = [x^n] Product_{k=0..n} (1 + (3*n+k)*x).
Terms
- a(0) =1a(1) =7a(2) =146a(3) =4578a(4) =189144a(5) =9660840a(6) =586813968a(7) =41283943344
External references
- oeis: A382349
A382349
a(n) = [x^n] Product_{k=0..n} (1 + (3*n+k)*x).