Number of -7..7 arrays x(0..n-1) of n elements with sum zero and with zeroth through n-1st differences all nonzero.
A200037
Number of -7..7 arrays x(0..n-1) of n elements with sum zero and with zeroth through n-1st differences all nonzero.
Terms
- a(0) =0a(1) =14a(2) =114a(3) =1330a(4) =14156a(5) =169170a(6) =1882238a(7) =22017152a(8) =254776338
External references
- oeis: A200037