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Search: id:A164758
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A164758 Number of nX6 1..4 arrays with all 1s connected, all 2s connected, all 3s connected, all 4s connected, 1 in the upper left corner, 2 in the upper right corner, 3 in the lower left corner, 4 in the lower right corner, and with no element having more than 2 neighbors with the same value +0
1
83, 644, 2570, 6742, 13654, 24738 (list; graph; listen)
OFFSET

2,1

EXAMPLE

Some solutions for n=3

...1.1.3.3.2.2...1.1.1.1.2.2...1.1.3.3.2.2...1.2.2.2.2.2...1.1.1.1.2.2

...3.1.1.3.4.2...3.3.3.1.2.4...3.1.1.3.4.4...1.2.4.4.4.4...3.3.3.3.3.3

...3.3.3.3.4.4...3.4.4.4.4.4...3.3.3.3.4.4...3.3.3.3.3.4...3.4.4.4.4.4

------

...1.1.1.1.2.2...1.1.1.1.2.2...1.1.1.1.1.2...1.2.2.2.2.2...1.3.3.4.2.2

...3.2.2.2.2.4...3.2.2.2.2.4...1.3.3.3.3.3...1.1.1.1.1.4...1.1.3.4.2.2

...3.3.3.4.4.4...3.3.3.3.4.4...3.3.4.4.4.4...3.3.4.4.4.4...3.3.3.4.4.4

CROSSREFS

Sequence in context: A142900 A033248 A142289 this_sequence A142751 A059236 A059935

Adjacent sequences: A164755 A164756 A164757 this_sequence A164759 A164760 A164761

KEYWORD

nonn

AUTHOR

Ron Hardin (rhhardin(AT)att.net) Aug 24 2009

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.


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