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A146776 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0010-1010-1111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 17, 27, 551, 1025, 9065, 24039, 430341, 1208611, 88984447, 322624067, 42836270201, 190686627801, 27661973527585, 149211196626477, 36642661396277021 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

LINKS

Table of n, a(n) for n=1..21.

EXAMPLE

Maximal 8 X 8 example

.0.0.1.0.0.1.0.0

.1.1.1.0.0.1.1.1

.0.0.1.0.0.1.0.0

.0.1.1.0.0.1.1.0

.1.0.0.0.0.0.0.1

.1.1.1.0.0.1.1.1

.1.0.0.0.0.0.0.1

.1.1.0.0.0.0.1.1

CROSSREFS

Sequence in context: A000797 A171168 A147202 * A147218 A146856 A217409

Adjacent sequences:  A146773 A146774 A146775 * A146777 A146778 A146779

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified May 18 06:07 EDT 2022. Contains 353783 sequences. (Running on oeis4.)