Number of length n+2 0..3 arrays with the sum of second differences multiplied by some arrangement of +-1 equal to zero.
A250556
Number of length n+2 0..3 arrays with the sum of second differences multiplied by some arrangement of +-1 equal to zero.
Terms
- a(0) =8a(1) =60a(2) =302a(3) =1516a(4) =7126a(5) =30780a(6) =127586a(7) =518052a(8) =2085808a(9) =8367220a(10) =33513408a(11) =134137736a(12) =536713774a(13) =2147172564a(14) =8589316642a(15) =34358507208a(16) =137436497326a(17) =549750908948
External references
- oeis: A250556