Number of permutation symbols of type *a(n) for hyperbolic archimedean tessellations of rank n.
A142870
Number of permutation symbols of type *a(n) for hyperbolic archimedean tessellations of rank n.
Terms
- a(0) =1a(1) =1a(2) =1a(3) =3a(4) =4a(5) =11a(6) =16a(7) =45a(8) =64a(9) =193a(10) =276a(11) =873a(12) =1252a(13) =4167a(14) =6028a(15) =20793a(16) =30364a(17) =108699
External references
- oeis: A142870