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

Terms

a(0) =1a(1) =0a(2) =4a(3) =5a(4) =13a(5) =17a(6) =33a(7) =41a(8) =66a(9) =82a(10) =117a(11) =142a(12) =191a(13) =226a(14) =290a(15) =339a(16) =419a(17) =483a(18) =583a(19) =663a(20) =784a(21) =884a(22) =1027a(23) =1148a(24) =1317a(25) =1460a(26) =1656a(27) =1825a(28) =2049a(29) =2245