225565

Appears in sequences

• Number of regions in an equilateral triangular figure formed by the straight line segments connecting all vertices and all points that divide the sides into n equal parts.at n=18A092867
• Number of -n..n circular arrays x(0..5) of 6 elements with zero sums of x(i) and x(i)*x((i+1) mod 6).at n=23A202008