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A147415

Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 1001-1111-0110 pattern in any orientation.

1, 1, 1, 1, 1, 1, 1, 6, 9, 32, 25, 194, 81, 1875, 559, 19586

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

OFFSET

1,8

LINKS

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

EXAMPLE

Maximal 8 X 8 example

.0.0.1.0.0.1.0.0

.0.0.1.1.1.1.0.0

.1.1.0.1.1.0.1.1

.0.1.1.0.0.1.1.0

.1.1.0.1.1.0.1.1

.0.0.1.1.1.1.0.0

.0.0.1.0.0.1.0.0

CROSSREFS

Sequence in context: A180325 A192425 A219687 * A217048 A105866 A267690

Adjacent sequences: A147412 A147413 A147414 * A147416 A147417 A147418

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

URL: https://oeis.org/A147415

⇱ A147415 - OEIS