Number of zero-sum -3..3 arrays of n elements with adjacent element differences also in -3..3.
A202247
Number of zero-sum -3..3 arrays of n elements with adjacent element differences also in -3..3.
Terms
- a(0) =1a(1) =3a(2) =17a(3) =81a(4) =397a(5) =2003a(6) =10239a(7) =52697a(8) =273021a(9) =1422337a(10) =7442827a(11) =39091861a(12) =205972443a(13) =1088212379a(14) =5762943375a(15) =30582601227a(16) =162591973175a(17) =865826349887
External references
- oeis: A202247