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A146373 Number of n X n binary arrays with all ones connected only in a 0100-1111-0100 pattern in any orientation. 0
1, 1, 1, 9, 25, 125, 1331, 18779, 389231, 11969301, 573650431, 41782304071, 4475707668912, 731606853804073, 181071469572900858 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..15.

EXAMPLE

Maximal 8 X 8 example

.0.1.0.0.0.0.0.0

.1.1.1.1.0.0.0.0

.0.1.0.0.0.0.1.0

.0.0.0.0.0.1.1.1

.0.1.0.0.1.0.1.0

.1.1.1.0.1.0.1.0

.0.1.0.1.1.1.0.0

.0.1.0.0.1.0.0.0

CROSSREFS

Sequence in context: A139818 A227078 A146365 * A084605 A098773 A089998

Adjacent sequences:  A146370 A146371 A146372 * A146374 A146375 A146376

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified November 14 02:19 EST 2019. Contains 329108 sequences. (Running on oeis4.)