G.f.: Sum_{n>=0} x^n * Product_{k=1..n} (k - 2*x) / (1 - 2*k*x).
A231173
G.f.: Sum_{n>=0} x^n * Product_{k=1..n} (k - 2*x) / (1 - 2*k*x).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =12a(4) =98a(5) =956a(6) =10936a(7) =144228a(8) =2158408a(9) =36163480a(10) =670866440a(11) =13653114768a(12) =302484623696
External references
- oeis: A231173