5638336

Appears in sequences

• Number of 0..n arrays of length 7 with each element differing from at least one neighbor by 1 or less.at n=28A221599
• 3-level binary fanout graph coloring a rectangular array: number of n X 3 0..6 arrays where 0..6 label nodes of a graph with edges 0,1 1,3 1,4 0,2 2,5 2,6 and every array movement to a horizontal or vertical neighbor moves along an edge of this graph.at n=7A223418