Triangle read by rows giving number of circular permutations of n letters such that all letters are displaced by no more than k places from their original position.
A094315
Triangle read by rows giving number of circular permutations of n letters such that all letters are displaced by no more than k places from their original position.
Terms
- a(0) =1a(1) =0a(2) =1a(3) =0a(4) =0a(5) =2a(6) =0a(7) =0a(8) =0a(9) =6a(10) =1a(11) =0a(12) =6a(13) =8a(14) =9a(15) =2a(16) =15a(17) =20a(18) =40a(19) =30a(20) =13a(21) =20a(22) =72a(23) =180a(24) =176a(25) =180a(26) =72a(27) =20a(28) =144a(29) =609
External references
- oeis: A094315