Number of permutation symbols of type *r(n) for hyperbolic archimedean tessellations of rank n.
A142871
Number of permutation symbols of type *r(n) for hyperbolic archimedean tessellations of rank n.
Terms
- a(0) =1a(1) =6a(2) =2a(3) =9a(4) =6a(5) =24a(6) =20a(7) =76a(8) =76a(9) =272a(10) =312a(11) =1100a(12) =1384a(13) =4684a(14) =6512a(15) =23280a(16) =32400a(17) =118272
External references
- oeis: A142871