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A147036 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0100-0100-1111-0100 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 57, 101, 643, 1213, 11025, 24069, 404103, 1045647, 63992333, 202749207, 15427634943, 58155611415, 5752715311031, 25613170526609, 4354577724343601, 22986304172716415, 7655445641728562265 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,9
LINKS
EXAMPLE
Maximal 9 X 9 example
.0.1.0.0.0.0.0.1.0
.1.1.1.1.0.1.1.1.1
.0.1.0.0.0.0.0.1.0
.0.1.0.0.0.0.0.1.0
.0.0.0.0.0.0.0.0.0
.0.1.0.0.0.0.0.1.0
.0.1.0.0.0.0.0.1.0
.1.1.1.1.0.1.1.1.1
.0.1.0.0.0.0.0.1.0
CROSSREFS
Sequence in context: A145554 A111320 A147468 * A147044 A366206 A237663
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified July 23 21:03 EDT 2024. Contains 374565 sequences. (Running on oeis4.)