Number of arrangements of n+1 numbers x(i) in -7..7 with the sum of x(i)*x(i+1) equal to zero.
A188356
Number of arrangements of n+1 numbers x(i) in -7..7 with the sum of x(i)*x(i+1) equal to zero.
Terms
- a(0) =29a(1) =435a(2) =1569a(3) =22583a(4) =163745a(5) =2295051a(6) =25217201a(7) =355442823a(8) =4602176797a(9) =65556183495a(10) =902973314217
External references
- oeis: A188356