Number of -4..4 arrays of length n with the sum ahead of each element differing from the sum following that element by 4 or less.
A221963
Number of -4..4 arrays of length n with the sum ahead of each element differing from the sum following that element by 4 or less.
Terms
- a(0) =9a(1) =81a(2) =369a(3) =2241a(4) =12609a(5) =73089a(6) =419841a(7) =2419713a(8) =13930497a(9) =80230401a(10) =462012417a(11) =2660655105a(12) =15322038273a(13) =88236228609a(14) =508131934209
External references
- oeis: A221963