Crystal ball sequence for D_7 lattice.

Terms

a(0) =1a(1) =85a(2) =1583a(3) =13203a(4) =68853a(5) =264825a(6) =824083a(7) =2195399a(8) =5195081a(9) =11199037a(10) =22392919a(11) =42088091a(12) =75111165a(13) =128274849a(14) =210937851a(15) =335661583a(16) =518971409a(17) =782230181a(18) =1152631807a(19) =1664322595a(20) =2359658117a(21) =3290603337a(22) =4520283747