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A146190 Number of n X n binary arrays symmetric under horizontal and vertical reflection with all ones connected only in a 101-111-100 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 9, 9, 33, 33, 89, 89, 973, 973, 38577, 38577, 1078541, 1078541, 28644797, 28644797, 2049754535, 2049754535, 324959092887, 324959092887 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,7
LINKS
EXAMPLE
Maximal 8 X 8 example
.1.0.0.0.0.0.0.1
.1.1.1.0.0.1.1.1
.1.0.1.0.0.1.0.1
.0.0.0.0.0.0.0.0
.0.0.0.0.0.0.0.0
.1.0.1.0.0.1.0.1
.1.1.1.0.0.1.1.1
.1.0.0.0.0.0.0.1
CROSSREFS
Sequence in context: A147029 A146258 A146173 * A147125 A147109 A147117
KEYWORD
nonn
AUTHOR
R. H. Hardin, Oct 27 2008
STATUS
approved

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Last modified June 18 01:17 EDT 2024. Contains 373468 sequences. (Running on oeis4.)