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A146015 Number of n X n binary arrays with all ones connected only in a 2X4 el 1,1 1,2 1,3 1,4 2,4 with any orientation. 0
1, 1, 1, 29, 297, 3639, 84611, 2861167, 210769267, 22904472355, 4109900886123 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..11.

EXAMPLE

Maximal 8 X 8 example

.1.1.1.1.0.0.1.1

.1.0.0.0.0.0.0.1

.0.0.0.0.0.1.0.1

.1.0.0.0.0.1.0.1

.1.1.1.1.0.1.0.0

.0.0.0.0.0.1.1.0

.1.1.1.1.0.0.0.1

.1.0.0.0.1.1.1.1

CROSSREFS

Sequence in context: A244873 A125392 A126550 * A163708 A147831 A165616

Adjacent sequences:  A146012 A146013 A146014 * A146016 A146017 A146018

KEYWORD

nonn

AUTHOR

R. H. Hardin, Oct 26 2008

STATUS

approved

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Last modified October 28 04:43 EDT 2021. Contains 348313 sequences. (Running on oeis4.)