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A146909 Number of n X n binary arrays with all ones connected only in a 0100-1110-0111-0010 pattern in any orientation. 0
1, 1, 1, 3, 9, 21, 85, 553, 5197, 59067, 895397, 19192871, 570897325, 23035046469, 1263961153269, 94815577724879, 9730236725590873, 1365210979058853347 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..18.

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.1.0.0

.0.0.1.0.1.1.1.0

.0.1.1.1.0.1.1.1

.0.0.1.1.1.0.1.0

.0.1.0.1.0.1.0.0

.1.1.1.0.1.1.1.0

.0.1.1.1.0.1.1.1

.0.0.1.0.0.0.1.0

CROSSREFS

Sequence in context: A118932 A053499 A218003 * A146248 A074000 A067645

Adjacent sequences:  A146906 A146907 A146908 * A146910 A146911 A146912

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 04 2008

STATUS

approved

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Last modified July 12 09:35 EDT 2020. Contains 335657 sequences. (Running on oeis4.)