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A146442 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 1100-0100-0111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 3, 3, 9, 9, 23, 23, 51, 51, 307, 307, 2165, 2165, 14201, 14201 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,11

LINKS

Table of n, a(n) for n=1..24.

EXAMPLE

Maximal 11 X 11 example

.0.0.1.0.0.0.0.0.1.0.0

.0.0.1.1.1.0.1.1.1.0.0

.1.1.0.0.1.0.1.0.0.1.1

.0.1.0.0.1.0.1.0.0.1.0

.0.1.1.1.0.0.0.1.1.1.0

.0.0.0.0.0.0.0.0.0.0.0

.0.1.1.1.0.0.0.1.1.1.0

.0.1.0.0.1.0.1.0.0.1.0

.1.1.0.0.1.0.1.0.0.1.1

.0.0.1.1.1.0.1.1.1.0.0

.0.0.1.0.0.0.0.0.1.0.0

CROSSREFS

Sequence in context: A146250 A232023 A146695 * A147128 A147214 A146820

Adjacent sequences:  A146439 A146440 A146441 * A146443 A146444 A146445

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified August 9 09:22 EDT 2022. Contains 356021 sequences. (Running on oeis4.)