Expansion of Product_{k>=1} 1/(1 - x^k)^(2^omega(k)), where omega(k) = number of distinct primes dividing k (A001221).
A319130
Expansion of Product_{k>=1} 1/(1 - x^k)^(2^omega(k)), where omega(k) = number of distinct primes dividing k (A001221).
Terms
- a(0) =1a(1) =1a(2) =3a(3) =5a(4) =10a(5) =16a(6) =31a(7) =47a(8) =81a(9) =125a(10) =203a(11) =305a(12) =482a(13) =710a(14) =1082a(15) =1582a(16) =2348a(17) =3380a(18) =4933a(19) =7007a(20) =10048a(21) =14136a(22) =19972a(23) =27796a(24) =38822a(25) =53510a(26) =73903a(27) =101033a(28) =138165a(29) =187351
External references
- oeis: A319130