E.g.f.: exp( Sum_{n>=1} x^(2*n) * Sum_{k=1..n} 1/k^2 ).
A235776
E.g.f.: exp( Sum_{n>=1} x^(2*n) * Sum_{k=1..n} 1/k^2 ).
Terms
- a(0) =1a(1) =2a(2) =42a(3) =2000a(4) =170660a(5) =22741992a(6) =4344779208
External references
- oeis: A235776
A235776
E.g.f.: exp( Sum_{n>=1} x^(2*n) * Sum_{k=1..n} 1/k^2 ).