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

Terms

a(0) =0a(1) =1a(2) =1a(3) =4a(4) =7a(5) =14a(6) =24a(7) =42a(8) =69a(9) =113a(10) =178a(11) =276a(12) =420a(13) =630a(14) =930a(15) =1360a(16) =1963a(17) =2804a(18) =3969a(19) =5568a(20) =7746a(21) =10700a(22) =14672a(23) =19986a(24) =27060a(25) =36423a(26) =48754a(27) =64928a(28) =86038a(29) =113478