Crystal ball sequence for the lattice C_9.

Terms

a(0) =1a(1) =163a(2) =4645a(3) =57799a(4) =432073a(5) =2286955a(6) =9446125a(7) =32398735a(8) =96220561a(9) =254831667a(10) =614859189a(11) =1373356887a(12) =2874747225a(13) =5693596923a(14) =10751213181a(15) =19475555103a(16) =34015593249a(17) =57523019715a(18) =94516111685a(19) =151342583015a(20) =236760421097a(21) =362658000011a(22) =544937185805a(23) =804585705647