Crystal ball sequence for D_8 lattice.

Terms

a(0) =1a(1) =113a(2) =2705a(3) =28129a(4) =177697a(5) =807505a(6) =2908337a(7) =8818625a(8) =23429185a(9) =56070193a(10) =123302609a(11) =252868001a(12) =489082465a(13) =899992081a(14) =1586639089a(15) =2694819713a(16) =4429746305a(17) =7074058225a(18) =11009657617a(19) =16743877985a(20) =24940525217a(21) =36456362449a(22) =52383641905a(23) =74099318593a(24) =103321612481