G.f.: (1+x^8+x^9+x^10+x^18)/((1-x^2)*(1-x^3)*(1-x^4)*(1-x^5)*(1-x^6)*(1-x^7)).

Terms

a(0) =1a(1) =0a(2) =1a(3) =1a(4) =2a(5) =2a(6) =4a(7) =4a(8) =7a(9) =8a(10) =12a(11) =13a(12) =20a(13) =22a(14) =31a(15) =36a(16) =47a(17) =54a(18) =71a(19) =80a(20) =102a(21) =117a(22) =144a(23) =164a(24) =201a(25) =227a(26) =272a(27) =309a(28) =365a(29) =411