Number of magic labelings with magic sum n of 7th graph shown in link.

Terms

a(0) =1a(1) =21a(2) =179a(3) =938a(4) =3612a(5) =11242a(6) =29947a(7) =70855a(8) =152720a(9) =305330a(10) =573812a(11) =1023939a(12) =1748545a(13) =2875153a(14) =4574922a(15) =7073018a(16) =10660515a(17) =15707931a(18) =22680505a(19) =32155320a(20) =44840378a(21) =61595732a(22) =83456781a(23) =111659833a(24) =147670042a(25) =193211824a(26) =250301858a(27) =321284777a(28) =408871655a(29) =516181395