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A146595 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1000-1000-1111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 23, 33, 695, 1485, 24279, 63655, 1783137, 5665457, 342196123, 1330513267, 188030422867, 910767193965, 217509517678273, 1297575220619287, 530786226133942299, 3886182318855666813 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

LINKS

Table of n, a(n) for n=1..22.

EXAMPLE

Maximal 8 X 8 example

.1.1.1.0.0.1.1.1

.1.0.0.0.0.0.0.1

.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

.0.0.1.0.0.1.0.0

.1.1.1.0.0.1.1.1

CROSSREFS

Sequence in context: A043129 A043909 A145566 * A230123 A049851 A353087

Adjacent sequences: A146592 A146593 A146594 * A146596 A146597 A146598

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified February 3 23:01 EST 2023. Contains 360045 sequences. (Running on oeis4.)