Number of arrangements of n+2 nonzero numbers x(i) in -8..8 with the sum of x(i)*x(i+1) equal to zero.
A188248
Number of arrangements of n+2 nonzero numbers x(i) in -8..8 with the sum of x(i)*x(i+1) equal to zero.
Terms
- a(0) =256a(1) =816a(2) =17040a(3) =142532a(4) =2347608a(5) =28779900a(6) =445304272a(7) =6250275112a(8) =95625385124
External references
- oeis: A188248