G.f.: 1 = Sum_{n>=1} a(n) * x^n*(1-x)^(n+1) / Product_{k=1..n} (1 + (k+2)*x).
A208677
G.f.: 1 = Sum_{n>=1} a(n) * x^n*(1-x)^(n+1) / Product_{k=1..n} (1 + (k+2)*x).
Terms
- a(0) =1a(1) =1a(2) =5a(3) =34a(4) =287a(5) =2863a(6) =32746a(7) =420736a(8) =5983449a(9) =93133215a(10) =1572620167a(11) =28601774854a(12) =556966811404
External references
- oeis: A208677