Number of vertices at level n of the hyperbolic Pascal pyramid PP_(4,5).

Terms

a(0) =1a(1) =3a(2) =6a(3) =11a(4) =21a(5) =44a(6) =101a(7) =247a(8) =626a(9) =1615a(10) =4201a(11) =10968a(12) =28681a(13) =75051a(14) =196446a(15) =514259a(16) =1346301a(17) =3524612a(18) =9227501a(19) =24157855a(20) =63246026a(21) =165580183a(22) =433494481a(23) =1134903216a(24) =2971215121a(25) =7778742099a(26) =20365011126a(27) =53316291227a(28) =139583862501a(29) =365435296220