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URL: https://oeis.org/A146467

⇱ A146467 - OEIS

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A146467
Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 1100-0111-0100 pattern in any orientation.
0
1, 1, 1, 1, 1, 1, 5, 23, 45, 89, 241, 909, 3431, 17195, 80847, 474101, 2777977, 19564237, 147127789, 1326666153, 12641403749, 144835493185
OFFSET
1,7
EXAMPLE
Maximal 8 X 8 example
.0.0.0.0.0.1.1.0
.1.0.0.1.1.1.0.0
.1.1.1.0.0.1.0.0
.0.1.0.0.0.0.1.0
.0.1.0.0.0.0.1.0
.0.0.1.0.0.1.1.1
.0.0.1.1.1.0.0.1
.0.1.1.0.0.0.0.0
CROSSREFS
Sequence in context: A293533 A121308 A222088 * A053518 A154625 A107011
KEYWORD
nonn
AUTHOR
STATUS
approved