G.f.: Sum_{k>=1} x^(2*k)/(1+x^(2*k)) * Product_{k>=1} 1/(1-x^k).

Terms

a(0) =0a(1) =0a(2) =1a(3) =1a(4) =2a(5) =3a(6) =7a(7) =9a(8) =14a(9) =20a(10) =32a(11) =43a(12) =63a(13) =85a(14) =122a(15) =162a(16) =221a(17) =292a(18) =396a(19) =514a(20) =680a(21) =878a(22) =1147a(23) =1465a(24) =1886a(25) =2391a(26) =3050a(27) =3836a(28) =4841a(29) =6048