Number of -7..7 circular arrays x(0..n+1) of n+2 elements with zero sums of x(i) and x(i)*x((i+1) mod (n+2)).
A202005
Number of -7..7 circular arrays x(0..n+1) of n+2 elements with zero sums of x(i) and x(i)*x((i+1) mod (n+2)).
Terms
- a(0) =1a(1) =225a(2) =261a(3) =6385a(4) =53775a(5) =1039409a(6) =9882793a(7) =128920651a(8) =1579308193a(9) =23513859009a(10) =303320902795
External references
- oeis: A202005