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A147264 Number of n X n binary arrays symmetric about main diagonal with all ones connected only in a 0100-1100-0111-0001 pattern in any orientation. 0
1, 1, 1, 1, 1, 5, 15, 33, 77, 553, 3895, 24243, 170053, 2059185, 30409467, 474043707, 8705603341, 222308455647, 7060172178631, 259928502701315 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,6
LINKS
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.1.1
.0.0.0.0.0.0.1.0
.0.0.0.0.1.1.1.0
.0.0.0.1.0.1.0.0
.0.0.0.1.1.0.0.0
.0.1.1.1.0.0.0.0
.0.1.0.0.0.0.0.0
CROSSREFS
Sequence in context: A212983 A055004 A332355 * A147150 A279231 A238340
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified April 24 22:17 EDT 2024. Contains 371964 sequences. (Running on oeis4.)