217825

Appears in sequences

• Number of n X 2 1..5 arrays with every element value z a city block distance of exactly z from another element value z.at n=6A209021
• T(n,k)=Number of nXk 1..5 arrays with every element value z a city block distance of exactly z from another element value z.at n=29A209023
• Number of equilateral triangles bounded by the sides and diagonals of a regular 3n-gon.at n=24A238822