Expansion of e.g.f. Sum_{k>=1} (cosh(x^k) - 1) (even powers only).
A330255
Expansion of e.g.f. Sum_{k>=1} (cosh(x^k) - 1) (even powers only).
Terms
- a(0) =1a(1) =13a(2) =361a(3) =21841a(4) =1814401a(5) =260124481a(6) =43589145601
External references
- oeis: A330255