Number of -4..4 arrays x(0..n-1) of n elements with zeroth through n-1st differences all nonzero.
A199939
Number of -4..4 arrays x(0..n-1) of n elements with zeroth through n-1st differences all nonzero.
Terms
- a(0) =8a(1) =56a(2) =376a(3) =2474a(4) =16114a(5) =104268a(6) =672866a(7) =4334232a(8) =27893374a(9) =179433990a(10) =1154022716a(11) =7420994944a(12) =47717937374
External references
- oeis: A199939