Expansion (1+x^3)/(1-x-x^7).

Terms

a(0) =1a(1) =1a(2) =1a(3) =2a(4) =2a(5) =2a(6) =2a(7) =3a(8) =4a(9) =5a(10) =7a(11) =9a(12) =11a(13) =13a(14) =16a(15) =20a(16) =25a(17) =32a(18) =41a(19) =52a(20) =65a(21) =81a(22) =101a(23) =126a(24) =158a(25) =199a(26) =251a(27) =316a(28) =397a(29) =498