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A146587 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0110-1111-0100 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 17, 21, 549, 1019, 12531, 32807, 1040313, 3290973, 362333049, 1474237921, 266711200491, 1364122350485, 428284962927597, 2769561073160279, 1886319046954861837, 15405192560843785699, 21883415341502162253677 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,7
LINKS
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.0.1.0.0.0.0.1.0
.1.1.0.0.0.0.1.1
.1.1.1.0.0.1.1.1
.0.1.0.0.0.0.1.0
CROSSREFS
Sequence in context: A147052 A147132 A146840 * A147256 A147163 A147179
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified March 28 20:05 EDT 2024. Contains 371254 sequences. (Running on oeis4.)