Expansion of Product_{1 <= i < j} 1/(1 - x^(i*j)).

Terms

a(0) =1a(1) =0a(2) =1a(3) =1a(4) =2a(5) =2a(6) =5a(7) =4a(8) =9a(9) =9a(10) =16a(11) =17a(12) =31a(13) =31a(14) =52a(15) =59a(16) =89a(17) =101a(18) =154a(19) =172a(20) =254a(21) =294a(22) =412a(23) =483a(24) =675a(25) =782a(26) =1070a(27) =1265a(28) =1686a(29) =1996