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A146797 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0110-0100-1111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 5, 15, 37, 67, 105, 399, 1261, 4027, 19513, 89607, 517461, 2695467, 14080529, 92973015, 632822045 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,7
LINKS
EXAMPLE
Maximal 8 X 8 example
.1.0.0.0.1.1.1.1
.1.0.1.0.0.1.0.0
.1.1.1.0.0.1.1.0
.1.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.1
.0.1.1.0.0.1.1.1
.0.0.1.0.0.1.0.1
.1.1.1.1.0.0.0.1
CROSSREFS
Sequence in context: A369804 A137609 A109818 * A213487 A005491 A348780
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified February 29 06:26 EST 2024. Contains 370414 sequences. (Running on oeis4.)