Expansion of Product_{k>=1} (1 + x^k)^k / (1 + x^(4*k))^(4*k).

Terms

a(0) =1a(1) =1a(2) =2a(3) =5a(4) =4a(5) =12a(6) =20a(7) =29a(8) =53a(9) =80a(10) =127a(11) =199a(12) =311a(13) =468a(14) =715a(15) =1079a(16) =1621a(17) =2402a(18) =3541a(19) =5210a(20) =7574a(21) =11046a(22) =15926a(23) =22917a(24) =32804a(25) =46766a(26) =66419a(27) =93936a(28) =132331a(29) =185830