Number of permutations in S_n avoiding {bar 1}432 (i.e., every occurrence of 432 is contained in an occurrence of a 1432).
A137533
Number of permutations in S_n avoiding {bar 1}432 (i.e., every occurrence of 432 is contained in an occurrence of a 1432).
Terms
- a(0) =1a(1) =1a(2) =2a(3) =5a(4) =15a(5) =55a(6) =248a(7) =1357a(8) =8809a(9) =66323a(10) =568238a(11) =5456689a(12) =58023731a(13) =676566591a(14) =8581174564a(15) =117594655061
External references
- oeis: A137533