Coordination sequence for (3,3,7) tiling of hyperbolic plane.

Terms

a(0) =1a(1) =3a(2) =6a(3) =10a(4) =16a(5) =26a(6) =42a(7) =67a(8) =106a(9) =167a(10) =264a(11) =418a(12) =662a(13) =1048a(14) =1658a(15) =2623a(16) =4150a(17) =6567a(18) =10392a(19) =16444a(20) =26020a(21) =41172a(22) =65148a(23) =103087a(24) =163120a(25) =258113a(26) =408424a(27) =646268a(28) =1022620a(29) =1618140