Number of permutations of length n avoiding the pattern 1342.
A022558
Number of permutations of length n avoiding the pattern 1342.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =23a(5) =103a(6) =512a(7) =2740a(8) =15485a(9) =91245a(10) =555662a(11) =3475090a(12) =22214707a(13) =144640291a(14) =956560748a(15) =6411521056a(16) =43478151737a(17) =297864793993
External references
- oeis: A022558