2230800

Appears in sequences

• a(0) = 0, a(1) = 1 and a(n) = 6*a(n-1)/(n-1) + 4*a(n-2) for n > 1.at n=16A305032
• Number of regular polygons that can be drawn with vertices on a centered hexagonal grid with side length n.at n=32A339483