G.f.: 1/(1-x) = Sum_{n>=0} a(n)*x^n * Product_{k=1..n+1} (1-k*x).
A187806
G.f.: 1/(1-x) = Sum_{n>=0} a(n)*x^n * Product_{k=1..n+1} (1-k*x).
Terms
- a(0) =1a(1) =2a(2) =7a(3) =39a(4) =314a(5) =3388a(6) =46409a(7) =776267a(8) =15406059a(9) =354928082a(10) =9330754204a(11) =276092552520
External references
- oeis: A187806