Number of magic labelings with magic sum n of 8th graph shown in link.

Terms

a(0) =1a(1) =18a(2) =154a(3) =813a(4) =3157a(5) =9880a(6) =26429a(7) =62713a(8) =135470a(9) =271285a(10) =510485a(11) =911840a(12) =1558368a(13) =2564093a(14) =4082142a(15) =6313934a(16) =9519951a(17) =14031732a(18) =20265700a(19) =28738335a(20) =40083439a(21) =55070862a(22) =74627587a(23) =99860383a(24) =132081092a(25) =172833583a(26) =223923623a(27) =287450506a(28) =365841890a(29) =461890475