A183286 Half the number of n X 5 binary arrays with the number of 1-1 horizontal, vertical, diagonal and antidiagonal adjacencies equal to the number of 0-0 adjacencies.

3, 60, 116, 28440, 150979, 20021342, 174883800, 15784256016, 190371233229, 13214123612340, 200102144807730, 11502955439818200, 205999922595853530, 10299233834557356076, 209367465185057238144, 9421571590734744149556, 211077609046668511646118, 8765504736339948725175906

Offset

1,1

Comments

Column 5 of A183289.

Links

R. H. Hardin, Table of n, a(n) for n = 1..200

Example

Some solutions for 4 X 5 with a(1,1) = 0:
..0..0..1..0..1....0..0..0..0..0....0..1..1..1..0....0..0..1..1..0
..0..0..1..0..1....1..1..1..0..0....1..0..1..1..0....1..0..1..0..1
..0..0..1..1..0....1..0..1..0..1....0..1..0..1..0....1..0..1..1..0
..0..1..1..1..1....1..1..1..0..1....1..0..0..0..0....1..0..0..0..1

Crossrefs

Cf. A183289.

Sequence in context: A046024 A184951 A081853 * A195560 A229749 A283381

Adjacent sequences: A183283 A183284 A183285 * A183287 A183288 A183289

Keyword

nonn

Author

R. H. Hardin, Jan 03 2011

Status

approved