Number of permutations in S_n avoiding 352{bar 4}1 (i.e., every occurrence of 3521 is contained in an occurrence of a 35241).

A137534

Number of permutations in S_n avoiding 352{bar 4}1 (i.e., every occurrence of 3521 is contained in an occurrence of a 35241).

Terms

    a(0) =1a(1) =1a(2) =2a(3) =6a(4) =23a(5) =104a(6) =530a(7) =2959a(8) =17757a(9) =113000a(10) =754981a(11) =5255830a(12) =37898152a(13) =281717723a(14) =2150636759a(15) =16807757093

External references