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A146234 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 110-111-001 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 9, 9, 33, 33, 113, 113, 1393, 1393, 59521, 59521, 1585365, 1585365, 62771429, 62771429, 6390256297, 6390256297, 1169289395909, 1169289395909 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

LINKS

Table of n, a(n) for n=1..24.

EXAMPLE

Maximal 8 X 8 example

.0.0.1.0.0.1.0.0

.1.1.1.0.0.1.1.1

.1.1.0.0.0.0.1.1

.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0

.1.1.0.0.0.0.1.1

.1.1.1.0.0.1.1.1

.0.0.1.0.0.1.0.0

CROSSREFS

Sequence in context: A147109 A147117 A147263 * A146182 A147149 A147277

Adjacent sequences:  A146231 A146232 A146233 * A146235 A146236 A146237

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified May 21 10:21 EDT 2022. Contains 353908 sequences. (Running on oeis4.)