Triangle T(n,k) read by rows giving number of labeled mappings (or functional digraphs) from n points to themselves (endofunctions) with exactly k cycles, k=1..n.

A060281

Triangle T(n,k) read by rows giving number of labeled mappings (or functional digraphs) from n points to themselves (endofunctions) with exactly k cycles, k=1..n.

Terms

    a(0) =1a(1) =3a(2) =1a(3) =17a(4) =9a(5) =1a(6) =142a(7) =95a(8) =18a(9) =1a(10) =1569a(11) =1220a(12) =305a(13) =30a(14) =1a(15) =21576a(16) =18694a(17) =5595a(18) =745a(19) =45a(20) =1a(21) =355081a(22) =334369a(23) =113974a(24) =18515a(25) =1540a(26) =63a(27) =1a(28) =6805296a(29) =6852460

External references