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A146366 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-1111-0010 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 9, 11, 177, 319, 3003, 6719, 139575, 376577, 21426367, 72064749, 6669830837, 27576142719, 4258398011821, 21562611148069, 6466129232821053, 40212251188406927, 23038062541403770861, 176166950254157836203 (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

.0.0.0.0.0.0.0.0

.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

.0.1.1.0.0.1.1.0

.1.1.0.0.0.0.1.1

.0.1.0.0.0.0.1.0

CROSSREFS

Sequence in context: A119786 A147429 A147461 * A146603 A159003 A196509

Adjacent sequences:  A146363 A146364 A146365 * A146367 A146368 A146369

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified September 23 11:18 EDT 2021. Contains 347612 sequences. (Running on oeis4.)