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A147076 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 10000-11111-10000 pattern in any orientation. 0
1, 1, 1, 1, 3, 1, 19, 9, 139, 27, 2920, 1117, 150482, 41401, 10982835, 1602485, 1208797417, 157953713, 292923653699, 29971826239, 128550895495446, 9240996121217 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

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

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0

.0.0.0.0.0.0.0.0

.0.1.0.0.0.0.1.0

.0.1.0.0.0.0.1.0

.0.1.0.0.0.0.1.0

.0.1.0.0.0.0.1.0

.1.1.1.0.0.1.1.1

CROSSREFS

Sequence in context: A227888 A188109 A247232 * A027537 A192721 A002380

Adjacent sequences:  A147073 A147074 A147075 * A147077 A147078 A147079

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified November 20 10:09 EST 2019. Contains 329334 sequences. (Running on oeis4.)