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

Terms

a(0) =1a(1) =7a(2) =33a(3) =126a(4) =419a(5) =1260a(6) =3509a(7) =9185a(8) =22842a(9) =54395a(10) =124784a(11) =277059a(12) =597644a(13) =1256341a(14) =2580363a(15) =5189185a(16) =10236710a(17) =19840410a(18) =37832553a(19) =71060190a(20) =131610897a(21) =240585292a(22) =434431132a(23) =775483785a(24) =1369359198a(25) =2393425484a(26) =4143057525a(27) =7106240582a(28) =12083072562a(29) =20375932566