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Search: id:A147353
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A147353 Number of n X n binary arrays with all ones connected only in a 0110-0110-1111 pattern in any orientation. +0
1
1, 1, 1, 9, 25, 57, 551, 8604, 122881, 1647352, 42868635, 1998622860, 114645170079, 7404803994915 (list; graph; listen)
OFFSET

1,4

EXAMPLE

Maximal 8 X 8 example

.1.1.1.1.0.0.0.0

.0.1.1.0.0.0.0.1

.0.1.1.0.0.1.1.1

.0.0.0.0.0.1.1.1

.0.0.0.0.0.0.0.1

.1.1.1.1.0.1.1.0

.0.1.1.0.0.1.1.0

.0.1.1.0.1.1.1.1

CROSSREFS

Sequence in context: A147325 A147368 A147497 this_sequence A049740 A147405 A111440

Adjacent sequences: A147350 A147351 A147352 this_sequence A147354 A147355 A147356

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net)

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Last modified December 21 10:15 EST 2009. Contains 171081 sequences.


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