Number of (n+1)X7 0..2 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock differing from the number in each of its horizontal and vertical neighbors.

A205244

Number of (n+1)X7 0..2 arrays with the number of rightwards and downwards edge increases in each 2X2 subblock differing from the number in each of its horizontal and vertical neighbors.

Terms

    a(0) =677732a(1) =25443411a(2) =1334713506a(3) =60907844595

External references