Number of permutations in S_n avoiding {bar 5}1342 (i.e., every occurrence of 1342 is contained in an occurrence of a 51342).

A137544

Number of permutations in S_n avoiding {bar 5}1342 (i.e., every occurrence of 1342 is contained in an occurrence of a 51342).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =23a(5) =104a(6) =534a(7) =3064a(8) =19558a(9) =139015a(10) =1102745a(11) =9768906a(12) =96411670a(13) =1054341718a(14) =12683130974a(15) =166505323204

External references