Triangle of number of permutations of {1, 2, ..., n} having exactly k cycles, each of which is of length >=r for r=4.

A050212

Triangle of number of permutations of {1, 2, ..., n} having exactly k cycles, each of which is of length >=r for r=4.

Terms

    a(0) =6a(1) =24a(2) =120a(3) =720a(4) =5040a(5) =1260a(6) =40320a(7) =18144a(8) =362880a(9) =223776a(10) =3628800a(11) =2756160a(12) =39916800a(13) =35307360a(14) =1247400a(15) =479001600a(16) =476910720a(17) =38918880a(18) =6227020800a(19) =6822541440a(20) =889945056a(21) =87178291200a(22) =103440879360a(23) =18478684224

External references