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A146651 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 1100-0100-1111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 19, 27, 575, 1125, 11015, 28077, 425211, 1200943, 68898133, 240563637, 37717682283, 167346267341, 25928895855769, 138290723957205, 29142735143015429 (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

.0.0.0.0.0.0.0.0

.1.0.1.0.0.1.0.1

.1.1.1.0.0.1.1.1

.0.0.1.0.0.1.0.0

.1.0.1.0.0.1.0.1

.1.0.0.0.0.0.0.1

.1.1.1.0.0.1.1.1

.1.0.1.0.0.1.0.1

CROSSREFS

Sequence in context: A029537 A053592 A146683 * A146808 A147232 A141417

Adjacent sequences: A146648 A146649 A146650 * A146652 A146653 A146654

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified March 28 17:47 EDT 2023. Contains 361596 sequences. (Running on oeis4.)