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A146901 Number of n X n binary arrays with all ones connected only in a 0010-1110-0111-0100 pattern in any orientation. 0
1, 1, 1, 3, 9, 19, 49, 345, 3029, 26343, 253497, 4034589, 91237121, 2505865849, 83922611151, 3827327413577, 239094333954443, 19417775019886243 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,4
LINKS
EXAMPLE
Maximal 8 X 8 example
.0.1.0.0.0.1.0.0
.0.1.1.1.0.1.1.1
.1.1.1.0.1.1.1.0
.0.0.1.0.0.0.1.0
.0.1.0.0.0.1.0.0
.0.1.1.1.0.1.1.1
.1.1.1.0.1.1.1.0
.0.0.1.0.0.0.1.0
CROSSREFS
Sequence in context: A091411 A279682 A102001 * A147477 A146677 A077442
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified March 29 01:36 EDT 2024. Contains 371264 sequences. (Running on oeis4.)