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A146800 Number of n X n binary arrays symmetric under horizontal reflection with all ones connected only in a 0110-1100-0111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 17, 31, 559, 1013, 8291, 23145, 356907, 1013595, 108749189, 407493401, 61299279691, 281660353619, 43848445982931, 246087198399431, 73605493456575165, 501006153269757647 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,7
LINKS
EXAMPLE
Maximal 8 X 8 example
.0.0.1.0.0.1.0.0
.1.0.1.0.0.1.0.1
.1.1.1.0.0.1.1.1
.0.1.0.0.0.0.1.0
.1.0.0.0.0.0.0.1
.1.0.1.0.0.1.0.1
.1.1.1.0.0.1.1.1
.0.1.0.0.0.0.1.0
CROSSREFS
Sequence in context: A027722 A060342 A045700 * A146731 A146667 A146462
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified April 17 01:23 EDT 2024. Contains 371756 sequences. (Running on oeis4.)