Number of permutations of [n] avoiding the patterns 2-41-3, 3-14-2, 2-14-3, and 3-41-2.
A348351
Number of permutations of [n] avoiding the patterns 2-41-3, 3-14-2, 2-14-3, and 3-41-2.
Terms
- a(0) =1a(1) =1a(2) =2a(3) =6a(4) =20a(5) =72a(6) =274a(7) =1088a(8) =4470a(9) =18884a(10) =81652a(11) =360054a(12) =1614618a(13) =7346688a(14) =33856008a(15) =157777908a(16) =742637416
External references
- oeis: A348351