Expansion of 1 / Product_{k >= 1} (1-q^k)^2*(1-q^(11k))^2.

Terms

a(0) =1a(1) =2a(2) =5a(3) =10a(4) =20a(5) =36a(6) =65a(7) =110a(8) =185a(9) =300a(10) =481a(11) =754a(12) =1169a(13) =1780a(14) =2685a(15) =3996a(16) =5894a(17) =8600a(18) =12450a(19) =17860a(20) =25442a(21) =35964a(22) =50519a(23) =70490a(24) =97800a(25) =134892a(26) =185099a(27) =252664a(28) =343280a(29) =464200