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A146592 Number of n X n binary arrays symmetric under 90 degree rotation with all ones connected only in a 0110-1111-0100 pattern in any orientation. 0
1, 1, 1, 1, 1, 1, 3, 23, 47, 75, 181, 675, 3025, 16403, 71953, 340893, 1986607, 14754733, 121306057, 1066980245, 9641071515, 101852566849, 1271193446821 (list; graph; refs; listen; history; internal format)
OFFSET

1,7

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.1.0.0.0

.0.0.1.1.1.1.0.0

.0.1.0.1.1.0.1.0

.1.1.1.0.0.1.1.0

.0.1.1.0.0.1.1.1

.0.1.0.1.1.0.1.0

.0.0.1.1.1.1.0.0

.0.0.0.1.0.0.0.0

CROSSREFS

Sequence in context: A160022 A187094 A060651 * A107169 A032003 A031907

Adjacent sequences:  A146589 A146590 A146591 * A146593 A146594 A146595

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net), Nov 04 2008

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Last modified February 14 22:45 EST 2012. Contains 205680 sequences.