Number T(n,k) of permutations of [n] such that k is the GCD of the cycle lengths; triangle T(n,k), n>=0, 0<=k<=n, read by rows.

A346085

Number T(n,k) of permutations of [n] such that k is the GCD of the cycle lengths; triangle T(n,k), n>=0, 0<=k<=n, read by rows.

Terms

    a(0) =1a(1) =0a(2) =1a(3) =0a(4) =1a(5) =1a(6) =0a(7) =4a(8) =0a(9) =2a(10) =0a(11) =15a(12) =3a(13) =0a(14) =6a(15) =0a(16) =96a(17) =0a(18) =0a(19) =0a(20) =24a(21) =0a(22) =455a(23) =105a(24) =40a(25) =0a(26) =0a(27) =120a(28) =0a(29) =4320

External references