Expansion of Product_{k>=1} ((1 + x^k)/(1 - x^k))^phi(k), where phi is the Euler totient function A000010.
A318975
Expansion of Product_{k>=1} ((1 + x^k)/(1 - x^k))^phi(k), where phi is the Euler totient function A000010.
Terms
- a(0) =1a(1) =2a(2) =4a(3) =10a(4) =20a(5) =42a(6) =80a(7) =154a(8) =288a(9) =522a(10) =940a(11) =1658a(12) =2892a(13) =4970a(14) =8456a(15) =14218a(16) =23696a(17) =39122a(18) =64044a(19) =104042a(20) =167732a(21) =268602a(22) =427248a(23) =675482a(24) =1061632a(25) =1659298a(26) =2579676a(27) =3990418a(28) =6142892a(29) =9412906
External references
- oeis: A318975