511257

Appears in sequences

• Number of -6..6 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)).at n=5A202004
• Number of -n..n circular arrays x(0..7) of 8 elements with zero sums of x(i) and x(i)*x((i+1) mod 8).at n=5A202010