G.f.: Sum_{n>=0} (5*n+1)^n * x^n / (1 + (5*n+1)*x)^n.
A187740
G.f.: Sum_{n>=0} (5*n+1)^n * x^n / (1 + (5*n+1)*x)^n.
Terms
- a(0) =1a(1) =6a(2) =85a(3) =1650a(4) =40500a(5) =1200000a(6) =41625000a(7) =1653750000a(8) =74025000000
External references
- oeis: A187740