Number of cells that are a distance of n away in an order-5 hyperbolic square tiling.

Terms

a(0) =1a(1) =4a(2) =12a(3) =28a(4) =64a(5) =148a(6) =340a(7) =780a(8) =1792a(9) =4116a(10) =9452a(11) =21708a(12) =49856a(13) =114500a(14) =262964a(15) =603932a(16) =1387008a(17) =3185444a(18) =7315788a(19) =16801660a(20) =38587200a(21) =88620532a(22) =203528596a(23) =467429932a(24) =1073513728a(25) =2465464116a(26) =5662259500a(27) =13004116524a(28) =29865647552a(29) =68590349988