login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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
83, 644, 2570, 6742, 13654, 24738 (list; graph; refs; listen; history; internal format)
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 * A142751 A176633 A059236

Adjacent sequences:  A164755 A164756 A164757 * A164759 A164760 A164761

KEYWORD

nonn

AUTHOR

R. H. Hardin (rhhardin(AT)att.net) Aug 24 2009

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 14 05:09 EST 2012. Contains 205570 sequences.