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A146910 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-1110-0111-0010 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 21, 33, 187, 315, 2369, 4615, 64775, 147707, 4198889, 11294757, 484939233, 1526217059, 94525856839, 346917020079, 34819307110751, 149345046116449, 24639152995360273, 123617463688011623 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,9

LINKS

Table of n, a(n) for n=1..26.

EXAMPLE

Maximal 9 X 9 example

.0.1.0.0.0.0.0.1.0

.1.1.1.0.0.0.1.1.1

.0.1.1.1.0.1.1.1.0

.0.0.1.0.0.0.1.0.0

.0.0.0.0.0.0.0.0.0

.0.0.1.0.0.0.1.0.0

.0.1.1.1.0.1.1.1.0

.1.1.1.0.0.0.1.1.1

.0.1.0.0.0.0.0.1.0

CROSSREFS

Sequence in context: A270074 A032792 A146902 * A328862 A167397 A135595

Adjacent sequences:  A146907 A146908 A146909 * A146911 A146912 A146913

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified May 31 09:30 EDT 2020. Contains 334748 sequences. (Running on oeis4.)