Irregular triangle read by rows: T(n,k) is the number of n-permutations whose third-longest cycle has length exactly k; n >= 0, 0 <= k <= floor(n/3).

A350015

Irregular triangle read by rows: T(n,k) is the number of n-permutations whose third-longest cycle has length exactly k; n >= 0, 0 <= k <= floor(n/3).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =5a(4) =1a(5) =17a(6) =7a(7) =74a(8) =46a(9) =394a(10) =311a(11) =15a(12) =2484a(13) =2241a(14) =315a(15) =18108a(16) =17627a(17) =4585a(18) =149904a(19) =152839a(20) =57897a(21) =2240a(22) =1389456a(23) =1460944a(24) =705600a(25) =72800a(26) =14257440a(27) =15326180a(28) =8673060a(29) =1660120

External references