Number of -7..7 arrays x(0..n+1) of n+2 elements with zero sum and nonzero second differences.
A200552
Number of -7..7 arrays x(0..n+1) of n+2 elements with zero sum and nonzero second differences.
Terms
- a(0) =154a(1) =2134a(2) =27806a(3) =372150a(4) =5012084a(5) =68263780a(6) =936121220a(7) =12911643944a(8) =178893425570
External references
- oeis: A200552