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A147405 Number of n X n binary arrays with all ones connected only in a 1001-1001-1111 pattern in any orientation. 0
1, 1, 1, 9, 25, 61, 265, 2725, 40501, 485293, 5980517, 124941205, 4561553811, 214166188181, 10710509884487, 650335804942117 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,4

LINKS

Table of n, a(n) for n=1..16.

EXAMPLE

Maximal 8 X 8 example

.1.1.1.0.1.1.1.1

.1.0.0.0.1.0.0.1

.1.0.0.0.1.0.0.1

.1.1.1.0.0.0.0.0

.0.0.0.0.0.1.1.1

.1.0.0.1.0.0.0.1

.1.0.0.1.0.0.0.1

.1.1.1.1.0.1.1.1

CROSSREFS

Sequence in context: A147497 A147353 A049740 * A111440 A077118 A242116

Adjacent sequences:  A147402 A147403 A147404 * A147406 A147407 A147408

KEYWORD

nonn

AUTHOR

R. H. Hardin

STATUS

approved

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Last modified August 4 09:03 EDT 2020. Contains 336201 sequences. (Running on oeis4.)