A147476 - OEIS

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A147476

Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-1111-1100 pattern in any orientation.

0

1, 1, 1, 1, 5, 1, 23, 11, 466, 277, 14218, 3983, 707294, 112981, 56470385, 8891967

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

OFFSET

1,5

LINKS

Table of n, a(n) for n=1..16.

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0

.0.1.0.0.0.0.1.0

.0.1.0.0.0.0.1.0

.1.1.1.0.0.1.1.1

.1.1.1.0.0.1.1.1

CROSSREFS

Sequence in context: A259682 A286897 A167572 * A146675 A201884 A294138

Adjacent sequences: A147473 A147474 A147475 * A147477 A147478 A147479

KEYWORD

nonn

AUTHOR

STATUS

approved