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A147387 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 10001-11111-00100 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 3, 9, 20, 57, 190, 629, 2776, 15917, 99291, 695261, 5658010, 52047047, 554192227, 6986434456, 103110572004, 1764252322607, 34869976082784 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,7
LINKS
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.1.1.0
.0.0.0.0.0.1.0.0
.0.0.0.0.1.1.0.0
.0.0.0.0.0.1.0.0
.0.0.1.0.0.1.1.0
.1.1.1.1.1.0.0.0
.1.0.0.0.1.0.0.0
.0.0.0.0.0.0.0.0
CROSSREFS
Sequence in context: A147356 A147416 A078841 * A146267 A151420 A196294
KEYWORD
nonn
AUTHOR
STATUS
approved

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Last modified July 17 19:13 EDT 2024. Contains 374377 sequences. (Running on oeis4.)