E.g.f.: Sum_{n>=0} Product_{k=1..n} tanh((2*k-1)*x).
A218260
E.g.f.: Sum_{n>=0} Product_{k=1..n} tanh((2*k-1)*x).
Terms
- a(0) =1a(1) =1a(2) =6a(3) =88a(4) =2280a(5) =92416a(6) =5393376a(7) =428428288a(8) =44450655360
External references
- oeis: A218260
A218260
E.g.f.: Sum_{n>=0} Product_{k=1..n} tanh((2*k-1)*x).