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A146371 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0100-1111-0010 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 3, 13, 25, 41, 95, 287, 1007, 4035, 15127, 64629, 303257, 1705229, 10297463, 68501897, 489679427, 4005352321, 35909136431, 368495419925, 4031093827951, 49953339711585 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,7
LINKS
EXAMPLE
Maximal 8 X 8 example
.0.1.0.0.0.0.1.0
.1.1.0.0.1.1.1.1
.0.1.1.0.0.1.0.0
.0.1.0.0.0.0.0.0
.0.0.0.0.0.0.1.0
.0.0.1.0.0.1.1.0
.1.1.1.1.0.0.1.1
.0.1.0.0.0.0.1.0
CROSSREFS
Sequence in context: A261599 A144826 A030552 * A146379 A056714 A120074
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified April 22 18:29 EDT 2024. Contains 371906 sequences. (Running on oeis4.)