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A146240 Number of n X n binary arrays with all ones connected only in a 110-111-010 pattern in any orientation. 0
1, 1, 5, 17, 55, 445, 7601, 166611, 5058693, 255201297, 21434365863, 2739845770351, 552080325938657, 172381380433171337, 85160758251140175729 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,3

LINKS

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

EXAMPLE

Maximal 8 X 8 example

.0.0.0.0.0.0.1.0

.0.0.0.0.0.1.1.1

.0.0.0.1.1.0.1.1

.0.1.0.1.1.1.0.0

.1.1.1.0.1.0.1.0

.1.1.0.1.0.1.1.1

.0.0.1.1.1.0.1.1

.0.0.0.1.1.0.0.0

CROSSREFS

Sequence in context: A244235 A081495 A191645 * A112410 A146271 A145371

Adjacent sequences:  A146237 A146238 A146239 * A146241 A146242 A146243

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified February 21 20:04 EST 2020. Contains 332110 sequences. (Running on oeis4.)