Coordination sequence for E_8 lattice.

Terms

a(0) =1a(1) =240a(2) =9120a(3) =121680a(4) =864960a(5) =4113840a(6) =14905440a(7) =44480400a(8) =114879360a(9) =265422960a(10) =561403680a(11) =1105317840a(12) =2050966080a(13) =3620750640a(14) =6126497760a(15) =9994133520a(16) =15792541440a(17) =24266930160a(18) =36377039520a(19) =53340513360a(20) =76681767360