login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A209791 Half the number of (n+1)X4 0..2 arrays with every 2X2 subblock having exactly one duplicate clockwise edge difference 1
1380, 49056, 1732554, 61289190, 2167312950, 76648760118, 2710658447034, 95862567834618, 3390172069647198, 119893318115163858, 4240021127786852970, 149948156963937950274, 5302909535051211495570, 187537150802706970729950 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A209796
LINKS
FORMULA
Empirical: a(n) = 23*a(n-1) +474*a(n-2) -947*a(n-3) -13207*a(n-4) +27207*a(n-5) +14500*a(n-6) -33255*a(n-7) -1722*a(n-8) +5600*a(n-9) +816*a(n-10)
EXAMPLE
Some solutions for n=4
..1..1..0..1....0..1..0..2....2..1..0..2....1..0..2..0....0..2..0..1
..2..2..2..1....2..2..0..1....1..1..2..2....1..0..0..0....2..2..1..1
..1..1..0..0....2..0..0..1....1..0..2..1....2..2..0..1....0..2..1..2
..2..0..0..1....2..1..0..1....0..0..2..0....2..0..0..0....2..2..0..2
..0..0..1..1....1..1..2..2....0..2..2..0....2..0..1..1....2..0..0..1
CROSSREFS
Sequence in context: A204056 A204049 A204048 * A051114 A139667 A031796
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 13 2012
STATUS
approved

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified July 21 18:17 EDT 2024. Contains 374475 sequences. (Running on oeis4.)