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

Terms

a(0) =1a(1) =2a(2) =9a(3) =28a(4) =88a(5) =250a(6) =708a(7) =1894a(8) =4988a(9) =12718a(10) =31839a(11) =77952a(12) =187771a(13) =444526a(14) =1037522a(15) =2387670a(16) =5426996a(17) =12188774a(18) =27079379a(19) =59541078a(20) =129663636a(21) =279801102a(22) =598620511a(23) =1270300142a(24) =2674874760a(25) =5591124784a(26) =11605082733a(27) =23926811840a(28) =49016020317a(29) =99798382290