Expansion of Product_{k>=1} 1/(1 - x^k)^(k*(k+1)*(2*k+1)/6).

Terms

a(0) =1a(1) =1a(2) =6a(3) =20a(4) =65a(5) =190a(6) =571a(7) =1616a(8) =4555a(9) =12439a(10) =33515a(11) =88517a(12) =230738a(13) =592321a(14) =1502384a(15) =3763946a(16) =9328899a(17) =22880511a(18) =55585077a(19) =133806273a(20) =319373068a(21) =756124040a(22) =1776497540a(23) =4143489680a(24) =9597505006a(25) =22083821765a(26) =50494638926a(27) =114758996621a(28) =259303832735a(29) =582655202940