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

Terms

a(0) =1a(1) =1a(2) =4a(3) =14a(4) =36a(5) =101a(6) =260a(7) =669a(8) =1669a(9) =4116a(10) =9932a(11) =23636a(12) =55483a(13) =128532a(14) =294422a(15) =667026a(16) =1496232a(17) =3324720a(18) =7323570a(19) =15998749a(20) =34679966a(21) =74622839a(22) =159454379a(23) =338472749a(24) =713956569a(25) =1496950669a(26) =3120663129a(27) =6469901522a(28) =13343153563a(29) =27379250529