Number of -4..4 arrays x(0..n-1) of n elements with zero sum, adjacent elements differing by more than one, and elements alternately increasing and decreasing.
A200188
Number of -4..4 arrays x(0..n-1) of n elements with zero sum, adjacent elements differing by more than one, and elements alternately increasing and decreasing.
Terms
- a(0) =1a(1) =8a(2) =28a(3) =120a(4) =506a(5) =2240a(6) =9856a(7) =44562a(8) =199932a(9) =914676a(10) =4152696a(11) =19143782a(12) =87622590a(13) =406118090a(14) =1869888346a(15) =8701509206a(16) =40245967276a(17) =187867050760a(18) =872020225984
External references
- oeis: A200188