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A146393 Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1000-1100-0111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 3, 9, 19, 43, 141, 419, 1255, 5087, 24913, 131971, 734375, 4818949, 34664741, 269727721, 2371934855, 24159321229, 274622983853 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,8

LINKS

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

EXAMPLE

Maximal 8 X 8 example

.0.1.1.1.0.0.0.0

.1.0.0.1.1.0.0.0

.1.0.0.0.1.0.0.0

.1.1.0.0.0.1.1.0

.0.1.1.0.0.0.1.1

.0.0.0.1.0.0.0.1

.0.0.0.1.1.0.0.1

.0.0.0.0.1.1.1.0

CROSSREFS

Sequence in context: A147371 A075188 A051894 * A147431 A329145 A348377

Adjacent sequences:  A146390 A146391 A146392 * A146394 A146395 A146396

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified September 29 09:23 EDT 2022. Contains 357088 sequences. (Running on oeis4.)