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A146390 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1100-0111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 23, 37, 875, 1963, 36757, 101419, 3822491, 13049405, 1249688673, 5392077739, 1212521843981, 6669127121253, 2534961643458601, 17521933465479479, 12481578238641974653 (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

.0.1.1.0.0.1.1.0

.1.1.0.0.0.0.1.1

.1.0.0.0.0.0.0.1

.1.0.0.0.0.0.0.1

.0.0.1.0.0.1.0.0

.0.0.1.0.0.1.0.0

.0.1.1.0.0.1.1.0

.1.1.0.0.0.0.1.1

CROSSREFS

Sequence in context: A090312 A089782 A113893 * A233385 A282712 A134754

Adjacent sequences:  A146387 A146388 A146389 * A146391 A146392 A146393

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified July 18 15:26 EDT 2019. Contains 325143 sequences. (Running on oeis4.)