Number of strings of n+2 numbers x(i) in -4..4 with the sum of x(i) equal to zero and the sums of x(i)*x(i+1) and x(i)*x(i+2) equal to each other.
A184056
Number of strings of n+2 numbers x(i) in -4..4 with the sum of x(i) equal to zero and the sums of x(i)*x(i+1) and x(i)*x(i+2) equal to each other.
Terms
- a(0) =1a(1) =19a(2) =109a(3) =541a(4) =4769a(5) =40483a(6) =327223a(7) =2590527a(8) =20896283a(9) =167580009a(10) =1349709835a(11) =11155226611a(12) =93502733191a(13) =786281486125
External references
- oeis: A184056