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A147010 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 00100-11111-00100 pattern in any orientation. 0
1, 1, 1, 1, 3, 5, 9, 19, 56, 167, 758, 2457, 14728, 66625, 526225, 3298653, 34425031, 276512141, 3848586911, 41626261490 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,5

LINKS

Table of n, a(n) for n=1..20.

EXAMPLE

Maximal 8 X 8 example

.0.1.0.0.0.1.0.0

.0.1.0.1.1.1.1.1

.1.1.1.0.0.1.0.0

.0.1.0.0.0.0.1.0

.0.1.0.0.0.0.1.0

.0.0.1.0.0.1.1.1

.1.1.1.1.1.0.1.0

.0.0.1.0.0.0.1.0

CROSSREFS

Sequence in context: A192480 A107028 A147470 * A146912 A146940 A146251

Adjacent sequences:  A147007 A147008 A147009 * A147011 A147012 A147013

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified August 16 12:15 EDT 2022. Contains 356168 sequences. (Running on oeis4.)