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A146743 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1110-1111 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 13, 29, 57, 123, 437, 1523, 7643, 32273, 153925, 786845, 5340469, 36899655, 318800081, 2591600741, 26626203639, 272703572385 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,7
LINKS
EXAMPLE
Maximal 8 X 8 example
.0.0.0.1.1.1.1.0
.1.0.0.1.1.1.0.0
.1.1.0.0.0.0.0.0
.1.1.0.0.0.0.1.1
.1.1.0.0.0.0.1.1
.0.0.0.0.0.0.1.1
.0.0.1.1.1.0.0.1
.0.1.1.1.1.0.0.0
CROSSREFS
Sequence in context: A098062 A094481 A045637 * A065546 A075636 A139838
KEYWORD
nonn
AUTHOR
R. H. Hardin, Nov 04 2008
STATUS
approved

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Last modified February 28 18:11 EST 2024. Contains 370400 sequences. (Running on oeis4.)