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A146181 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 110-111-100 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 133, 283, 2411, 6513, 104581, 308359, 31267501, 125706815, 30388182025, 158816649115, 38510941635475, 255401019744941, 142458224930527429, 1198142574949310095, 2063515953281030710129 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,7
LINKS
EXAMPLE
Maximal 8 X 8 example
.1.1.1.0.0.1.1.1
.1.1.0.0.0.0.1.1
.0.1.0.0.0.0.1.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.1.0.0.1.0.0
.1.1.1.0.0.1.1.1
.0.1.1.0.0.1.1.0
CROSSREFS
Sequence in context: A254692 A050882 A146233 * A105984 A115518 A064903
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 27 2008
STATUS
approved

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Last modified April 22 12:55 EDT 2024. Contains 371900 sequences. (Running on oeis4.)