G.f.: exp( Sum_{n>=1} (2^n + (-1)^n)^n * x^n/n ).
A211897
G.f.: exp( Sum_{n>=1} (2^n + (-1)^n)^n * x^n/n ).
Terms
- a(0) =1a(1) =1a(2) =13a(3) =127a(4) =21079a(5) =5748277a(6) =12575820727
External references
- oeis: A211897
A211897
G.f.: exp( Sum_{n>=1} (2^n + (-1)^n)^n * x^n/n ).