178834

Appears in sequences

• Number of -6..6 arrays x(0..n+1) of n+2 elements with zero sum and nonzero second differences.at n=3A200551
• T(n,k)=Number of -k..k arrays x(0..n+1) of n+2 elements with zero sum and nonzero second differences.at n=39A200553
• Number of -n..n arrays x(0..5) of 6 elements with zero sum and nonzero second differences.at n=5A200556
• Number of obtuse triangles, distinct up to congruence, on a centered hexagonal grid of size n.at n=22A241234