Crystal ball sequence for the lattice C_8.

Terms

a(0) =1a(1) =129a(2) =2945a(3) =29953a(4) =187137a(5) =845185a(6) =3032705a(7) =9173505a(8) =24331777a(9) =58161793a(10) =127791489a(11) =261902081a(12) =506298625a(13) =931299201a(14) =1641303169a(15) =2786931713a(16) =4580166657a(17) =7312946305a(18) =11379709825a(19) =17304414465a(20) =25772582657a(21) =37668968833a(22) =54121468545a(23) =76551925249