Number of permutations in S_n that avoid the pattern 53421.
A256207
Number of permutations in S_n that avoid the pattern 53421.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =24a(5) =119a(6) =694a(7) =4582a(8) =33325a(9) =261853a(10) =2191902a(11) =19344408a(12) =178582940a(13) =1713999264a(14) =17019444969a(15) =174149184184
External references
- oeis: A256207