Coordination sequence for (3,3,6) tiling of hyperbolic plane.

Terms

a(0) =1a(1) =3a(2) =6a(3) =10a(4) =16a(5) =26a(6) =41a(7) =64a(8) =99a(9) =154a(10) =240a(11) =374a(12) =582a(13) =905a(14) =1408a(15) =2191a(16) =3410a(17) =5306a(18) =8256a(19) =12846a(20) =19989a(21) =31104a(22) =48399a(23) =75310a(24) =117184a(25) =182342a(26) =283730a(27) =441493a(28) =686976a(29) =1068955