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A147114 Number of n X n binary arrays symmetric under 180 degree rotation with all ones connected only in a 1000-1000-1111-0010 pattern in any orientation. 0
1, 1, 1, 1, 1, 5, 25, 81, 473, 2129, 11977, 83125, 759723, 8281919, 118112177, 1957920765 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,6
LINKS
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.1.0.0
.1.1.1.0.1.1.1.1
.0.0.1.0.0.0.0.1
.0.0.1.1.0.1.0.1
.1.0.1.0.1.1.0.0
.1.0.0.0.0.1.0.0
.1.1.1.1.0.1.1.1
.0.0.1.0.0.0.0.0
CROSSREFS
Sequence in context: A122679 A264132 A355949 * A296669 A131537 A250555
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified March 4 11:14 EST 2024. Contains 370528 sequences. (Running on oeis4.)