Expansion of e.g.f. exp(Sum_{k>=1} phi(k)^4 * x^k/k), where phi is the Euler totient function A000010.
A377509
Expansion of e.g.f. exp(Sum_{k>=1} phi(k)^4 * x^k/k), where phi is the Euler totient function A000010.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =36a(4) =234a(5) =7290a(6) =54540a(7) =1408680a(8) =23119740a(9) =341788860a(10) =11790437400a(11) =231972879600
External references
- oeis: A377509