Expansion of Product_{k>=1} ((1 - x^(7*(2*k-1))) * (1 - x^(7*k)) / (1 - x^k)).

Terms

a(0) =1a(1) =1a(2) =2a(3) =3a(4) =5a(5) =7a(6) =11a(7) =13a(8) =20a(9) =26a(10) =36a(11) =46a(12) =63a(13) =79a(14) =105a(15) =132a(16) =171a(17) =213a(18) =273a(19) =336a(20) =425a(21) =522a(22) =650a(23) =793a(24) =981a(25) =1188a(26) =1456a(27) =1756a(28) =2136a(29) =2563