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A147485 Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 11011-01110-00100 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 2, 3, 5, 7, 13, 19, 54, 129, 405, 1014, 3416, 8953, 35203, 121647, 602370, 2444491, 14100721, 64488491, 418264276, 2289523483 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,7

LINKS

Table of n, a(n) for n=1..26.

EXAMPLE

Maximal 8 X 8 example

.0.0.1.1.0.1.1.0

.0.0.0.1.1.1.0.1

.1.0.0.0.1.0.1.1

.1.1.0.0.0.1.1.0

.0.1.1.0.0.0.1.1

.1.1.0.1.0.0.0.1

.1.0.1.1.1.0.0.0

.0.1.1.0.1.1.0.0

CROSSREFS

Sequence in context: A252398 A330383 A146999 * A341650 A341640 A104189

Adjacent sequences:  A147482 A147483 A147484 * A147486 A147487 A147488

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified October 23 11:14 EDT 2021. Contains 348211 sequences. (Running on oeis4.)