Coordination sequence for E_7 lattice.

Terms

a(0) =1a(1) =126a(2) =2898a(3) =25886a(4) =133506a(5) =490014a(6) =1433810a(7) =3573054a(8) =7902594a(9) =15942206a(10) =29896146a(11) =52834014a(12) =88892930a(13) =143501022a(14) =223622226a(15) =338022398a(16) =497556738a(17) =715478526a(18) =1007769170a(19) =1393489566