Coordination sequence for (2,4,7) tiling of hyperbolic plane.

Terms

a(0) =1a(1) =3a(2) =5a(3) =8a(4) =12a(5) =17a(6) =25a(7) =36a(8) =50a(9) =70a(10) =98a(11) =137a(12) =193a(13) =271a(14) =379a(15) =531a(16) =744a(17) =1042a(18) =1461a(19) =2048a(20) =2869a(21) =4020a(22) =5633a(23) =7893a(24) =11061a(25) =15500a(26) =21719a(27) =30434a(28) =42646a(29) =59758