Number of alternating permutations on 2n+1 letters that avoid a certain pattern of length 5 (see Lewis, 2012, Appendix, for precise definition).
A217812
Number of alternating permutations on 2n+1 letters that avoid a certain pattern of length 5 (see Lewis, 2012, Appendix, for precise definition).
Terms
- a(0) =1a(1) =2a(2) =16a(3) =243a(4) =5291a(5) =144430a(6) =4601223a(7) =164005785a(8) =2072049543
External references
- oeis: A217812