Layer counting sequence for hyperbolic tessellation by regular heptagons of angle Pi/3.

A054890

Layer counting sequence for hyperbolic tessellation by regular heptagons of angle Pi/3.

Terms

    a(0) =1a(1) =7a(2) =42a(3) =245a(4) =1428a(5) =8323a(6) =48510a(7) =282737a(8) =1647912a(9) =9604735a(10) =55980498a(11) =326278253a(12) =1901689020a(13) =11083855867a(14) =64601446182a(15) =376524821225

External references