Number of permutations in S_n avoiding {bar 1}3245 (i.e., every occurrence of 3245 is contained in an occurrence of a 13245).
A137543
Number of permutations in S_n avoiding {bar 1}3245 (i.e., every occurrence of 3245 is contained in an occurrence of a 13245).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =23a(5) =104a(6) =534a(7) =3060a(8) =19445a(9) =136976a(10) =1072110a(11) =9344781a(12) =90711178a(13) =977610989a(14) =11627993555a(15) =151488021053
External references
- oeis: A137543