360416

Appears in sequences

• Number of (n+2) X 9 0..2 arrays with every 3 X 3 subblock having three equal elements in a row horizontally, vertically or nw-to-se diagonally exactly three ways, and new values 0..2 introduced in row major order.at n=10A204369
• a(n) is the number of regular hexagons with all six vertices (x,y,z) in the set {1,2,...,n}^3.at n=22A338322