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A147501 Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 1110-0110-0111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 3, 7, 13, 21, 43, 105, 253, 653 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,9
LINKS
EXAMPLE
Maximal 9 X 9 example
.0.0.0.0.1.1.1.0.0
.0.0.0.0.1.1.0.0.0
.0.0.0.1.1.1.0.0.1
.0.0.1.0.0.0.1.1.1
.1.1.1.0.0.0.1.1.1
.1.1.1.0.0.0.1.0.0
.1.0.0.1.1.1.0.0.0
.0.0.0.1.1.0.0.0.0
.0.0.1.1.1.0.0.0.0
CROSSREFS
Sequence in context: A018367 A146369 A146377 * A147335 A147464 A146058
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified March 29 08:13 EDT 2024. Contains 371265 sequences. (Running on oeis4.)