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A146374 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-1111-0100 pattern in any orientation. 0
1, 1, 1, 1, 5, 1, 29, 11, 899, 319, 40083, 6733, 3227138, 377583, 692995026, 72214151, 372813760407, 27637627655, 428803889872888, 21622063008199, 1097097155523363601, 40200348993008961, 6558007935506472623330 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..23.

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

.0.1.0.0.0.0.1.0

CROSSREFS

Sequence in context: A140713 A125906 A146414 * A188647 A232015 A214882

Adjacent sequences:  A146371 A146372 A146373 * A146375 A146376 A146377

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified July 24 05:07 EDT 2019. Contains 325290 sequences. (Running on oeis4.)