Number of -6..6 arrays x(0..n-1) of n elements with zero sum and elements alternately strictly increasing and strictly decreasing.
A200055
Number of -6..6 arrays x(0..n-1) of n elements with zero sum and elements alternately strictly increasing and strictly decreasing.
Terms
- a(0) =1a(1) =12a(2) =78a(3) =546a(4) =3914a(5) =28554a(6) =211242a(7) =1577878a(8) =11867186a(9) =89815404a(10) =682642050a(11) =5211283212a(12) =39897460856a(13) =306446600454
External references
- oeis: A200055