Number of permutations of [n] avoiding the pattern 143-2.
A200404
Number of permutations of [n] avoiding the pattern 143-2.
Terms
- a(0) =1a(1) =2a(2) =6a(3) =23a(4) =107a(5) =582a(6) =3622a(7) =25369a(8) =197523a(9) =1692535a(10) =15829557a(11) =160463512a(12) =1752529064a(13) =20516018396a(14) =256273980368
External references
- oeis: A200404