Number of length n+2 0..6 arrays with the sum of second differences multiplied by some arrangement of +-1 equal to zero.
A250559
Number of length n+2 0..6 arrays with the sum of second differences multiplied by some arrangement of +-1 equal to zero.
Terms
- a(0) =25a(1) =321a(2) =3125a(3) =31173a(4) =290909a(5) =2457921a(6) =18934449a(7) =137976845a(8) =980389815a(9) =6899647449a(10) =48392977271a(11) =339018816865
External references
- oeis: A250559