G.f.: (1+x)*(1+x^3)*(1+x^5)*(1+x^7)*(1+x^9)/((1-x^2)*(1-x^4)*(1-x^6)*(1-x^8)*(1-x^10)).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =3a(5) =4a(6) =5a(7) =7a(8) =10a(9) =13a(10) =16a(11) =20a(12) =26a(13) =32a(14) =38a(15) =47a(16) =58a(17) =69a(18) =81a(19) =96a(20) =114a(21) =133a(22) =153a(23) =177a(24) =206a(25) =236a(26) =267a(27) =304a(28) =346a(29) =390