Number T(n,k) of self-inverse permutations p on [n] where the minimal transposition distance equals k (k=0 for the identity permutation); triangle T(n,k), n>=0, 0<=k<=n, read by rows.
A239145
Number T(n,k) of self-inverse permutations p on [n] where the minimal transposition distance equals k (k=0 for the identity permutation); triangle T(n,k), n>=0, 0<=k<=n, read by rows.
Terms
- a(0) =1a(1) =1a(2) =0a(3) =1a(4) =1a(5) =0a(6) =1a(7) =2a(8) =1a(9) =0a(10) =1a(11) =5a(12) =3a(13) =1a(14) =0a(15) =1a(16) =13a(17) =8a(18) =3a(19) =1a(20) =0a(21) =1a(22) =39a(23) =22a(24) =10a(25) =3a(26) =1a(27) =0a(28) =1a(29) =120
External references
- oeis: A239145