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A147373 Number of n X n binary arrays symmetric about the diagonal and under 90 degree rotation with all ones connected only in a 0111-1100-0111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 2, 1, 4, 1, 8, 3, 22, 9, 79, 19, 256, 42, 946, 149, 4545, 642, 27699, 3217 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,9
LINKS
EXAMPLE
Maximal 9 X 9 example
.0.0.0.1.0.1.0.0.0
.0.0.0.1.0.1.0.0.0
.0.0.0.1.1.1.0.0.0
.1.1.1.0.1.0.1.1.1
.0.0.1.1.0.1.1.0.0
.1.1.1.0.1.0.1.1.1
.0.0.0.1.1.1.0.0.0
.0.0.0.1.0.1.0.0.0
.0.0.0.1.0.1.0.0.0
CROSSREFS
Sequence in context: A200583 A366842 A115120 * A147441 A146269 A146679
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified March 28 18:04 EDT 2024. Contains 371254 sequences. (Running on oeis4.)