Number of -7..7 arrays x(0..n-1) of n elements with zero sum and elements alternately strictly increasing and strictly decreasing.
A200056
Number of -7..7 arrays x(0..n-1) of n elements with zero sum and elements alternately strictly increasing and strictly decreasing.
Terms
- a(0) =1a(1) =14a(2) =106a(3) =850a(4) =7074a(5) =59910a(6) =514168a(7) =4453946a(8) =38855488a(9) =341052122a(10) =3006680636a(11) =26619825378a(12) =236386648574
External references
- oeis: A200056