Crystal ball sequence for hyperbolic tessellation 3^7 (from triangle group (2,3,7)).

Terms

a(0) =1a(1) =8a(2) =29a(3) =85a(4) =232a(5) =617a(6) =1625a(7) =4264a(8) =11173a(9) =29261a(10) =76616a(11) =200593a(12) =525169a(13) =1374920a(14) =3599597a(15) =9423877a(16) =24672040a(17) =64592249a(18) =169104713a(19) =442721896a(20) =1159060981a(21) =3034461053a(22) =7944322184a(23) =20798505505a(24) =54451194337a(25) =142555077512a(26) =373214038205a(27) =977087037109