Number of permutations in S_n avoiding 5134{bar 2} (i.e., every occurrence of 5134 is contained in an occurrence of a 51342).

A137537

Number of permutations in S_n avoiding 5134{bar 2} (i.e., every occurrence of 5134 is contained in an occurrence of a 51342).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =23a(5) =104a(6) =532a(7) =3003a(8) =18400a(9) =120960a(10) =845823a(11) =6249642a(12) =48539947a(13) =394620211a(14) =3346466726a(15) =29516055880

External references