a(n) is the number of length n decorated permutations avoiding the pattern 001.
A334155
a(n) is the number of length n decorated permutations avoiding the pattern 001.
Terms
- a(0) =1a(1) =2a(2) =5a(3) =15a(4) =57a(5) =273a(6) =1593a(7) =10953a(8) =86553a(9) =771993a(10) =7666713a(11) =83871513a(12) =1001957913a(13) =12976997913a(14) =181106559513
External references
- oeis: A334155