Number of -7..7 arrays of length n with the sum ahead of each element differing from the sum following that element by 7 or less.
A221966
Number of -7..7 arrays of length n with the sum ahead of each element differing from the sum following that element by 7 or less.
Terms
- a(0) =15a(1) =225a(2) =1695a(3) =17025a(4) =159615a(5) =1535745a(6) =14661375a(7) =140355585a(8) =1342437375a(9) =12843782145a(10) =122870296575
External references
- oeis: A221966