A220245 - OEIS

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A220245

Equals two maps: number of nX4 binary arrays indicating the locations of corresponding elements equal to exactly two of their king-move neighbors in a random 0..1 nX4 array

4, 37, 816, 7140, 64258, 660677, 6228324, 59704733, 580593280, 5565851685, 53535536290

(list; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Column 4 of A220247

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Some solutions for n=3

..0..1..0..0....0..0..1..0....0..1..0..1....0..1..0..1....0..0..1..0

..0..0..1..0....1..1..0..0....0..0..1..0....0..0..0..0....0..0..1..1