Number of (undirected) Hamiltonian cycles of the graph of the n-th Johnson solid.

Terms

a(0) =4a(1) =5a(2) =7a(3) =11a(4) =16a(5) =90a(6) =6a(7) =16a(8) =30a(9) =80a(10) =240a(11) =6a(12) =30a(13) =12a(14) =52a(15) =160a(16) =268a(17) =67a(18) =225a(19) =716a(20) =3550a(21) =794a(22) =6228a(23) =44092a(24) =194620a(25) =9a(26) =96a(27) =396a(28) =361a(29) =1350