A220326 - OEIS

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A220326

Equals two maps: number of nX5 binary arrays indicating the locations of corresponding elements equal to exactly two of their horizontal and antidiagonal neighbors in a random 0..1 nX5 array

7, 174, 4062, 92093, 2065264, 46094354, 1026529800, 22841390408, 508110710307, 11302385499363, 251409042152240, 5592331837970994, 124395540371693940, 2767041352339397099

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

OFFSET

1,1

COMMENTS

Column 5 of A220328

LINKS

Table of n, a(n) for n=1..14.

EXAMPLE

Some solutions for n=3

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

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

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