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A147322 Number of n X n binary arrays symmetric about both diagonal and antidiagonal with all ones connected only in a 00100-00100-00100-11111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 1, 1, 2, 3, 5, 9, 15, 23, 50, 117, 289, 741, 2046, 5466, 16079, 52199, 188773, 719705, 3000618 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,9
LINKS
EXAMPLE
Maximal 9 X 9 example
.0.0.1.1.1.1.1.0.0
.0.0.0.0.1.0.0.0.0
.1.0.0.0.1.0.0.0.1
.1.0.0.0.1.0.0.0.1
.1.1.1.1.0.1.1.1.1
.1.0.0.0.1.0.0.0.1
.1.0.0.0.1.0.0.0.1
.0.0.0.0.1.0.0.0.0
.0.0.1.1.1.1.1.0.0
CROSSREFS
Sequence in context: A281704 A350607 A074693 * A143282 A323475 A097083
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified December 10 18:13 EST 2023. Contains 367717 sequences. (Running on oeis4.)