Number of permutations in S_n avoiding {bar 1}3425 (i.e., every occurrence of 3425 is contained in an occurrence of a 13425).
A137542
Number of permutations in S_n avoiding {bar 1}3425 (i.e., every occurrence of 3425 is contained in an occurrence of a 13425).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =23a(5) =104a(6) =533a(7) =3038a(8) =19128a(9) =133112a(10) =1028287a(11) =8859284a(12) =85298231a(13) =915617310a(14) =10887682031a(15) =142169785210
External references
- oeis: A137542