Expansion of e.g.f. Product_{k>=1} ((1 + x^k)/(1 - x^k))^(sigma(k)/k).
A318814
Expansion of e.g.f. Product_{k>=1} ((1 + x^k)/(1 - x^k))^(sigma(k)/k).
Terms
- a(0) =1a(1) =2a(2) =10a(3) =64a(4) =512a(5) =4768a(6) =53056a(7) =645440a(8) =8868352a(9) =133302016a(10) =2184149504a(11) =38530160128a(12) =733246566400
External references
- oeis: A318814