Number of permutations in S_n that avoid the pattern 34215.
A256205
Number of permutations in S_n that avoid the pattern 34215.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =119a(6) =694a(7) =4581a(8) =33285a(9) =260886a(10) =2173374a(11) =19032746a(12) =173741467a(13) =1642533692a(14) =15999488304a(15) =159917206735
External references
- oeis: A256205