G.f.: Sum_{n>=0} (3*n-1)^n * x^n / (1 + (3*n-1)*x)^n.
A229036
G.f.: Sum_{n>=0} (3*n-1)^n * x^n / (1 + (3*n-1)*x)^n.
Terms
- a(0) =1a(1) =2a(2) =21a(3) =270a(4) =4212a(5) =77760a(6) =1662120a(7) =40415760a(8) =1102248000a(9) =33331979520
External references
- oeis: A229036