Number of 1324-avoiding permutations of length n with a non-intersecting boundary of type (t, 2), for some integer t >= 1.
A278026
Number of 1324-avoiding permutations of length n with a non-intersecting boundary of type (t, 2), for some integer t >= 1.
Terms
- a(0) =0a(1) =0a(2) =1a(3) =1a(4) =4a(5) =14a(6) =49a(7) =174a(8) =626a(9) =2276a(10) =8346a(11) =30821a(12) =114495a(13) =427481
External references
- oeis: A278026