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A146823 Number of n X n binary arrays with all ones connected only in a 1000-1111-0100-0100 pattern in any orientation. 0
1, 1, 1, 9, 33, 81, 501, 9765, 253829, 5201161, 149256829, 9047294209, 886839186693, 108530571403501 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
LINKS
EXAMPLE
Maximal 8 X 8 example
.1.1.0.0.1.1.0.0
.0.1.1.1.0.1.1.1
.0.1.0.0.0.1.0.0
.0.1.0.0.0.1.0.0
.1.0.0.0.0.0.1.0
.1.1.1.1.0.0.1.0
.0.1.0.0.1.1.1.0
.0.1.0.0.0.0.1.1
CROSSREFS
Sequence in context: A273316 A101990 A147170 * A147027 A146256 A005920
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified June 18 15:28 EDT 2024. Contains 373481 sequences. (Running on oeis4.)