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

 

Logo

Annual Appeal: Today, Nov 11 2014, is the 4th anniversary of the launch of the new OEIS web site. 70,000 sequences have been added in these four years, all edited by volunteers. Please make a donation (tax deductible in the US) to help keep the OEIS running.

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A210008 Number of (n+1)X5 0..2 arrays containing all values 0..2 with every 2X2 subblock having two or three distinct values, and new values 0..2 introduced in row major order 1
8217, 1808865, 385841179, 82060746485, 17447565687601, 3709556186877991, 788692753629890373, 167684774000295868135, 35651630563687273774303, 7579929460620522393582529, 1611576517115404819603119985 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A210012

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

FORMULA

Empirical: a(n) = 218*a(n-1) -672*a(n-2) -102513*a(n-3) +336965*a(n-4) +9441327*a(n-5) -64650448*a(n-6) +29276745*a(n-7) +733248704*a(n-8) -1733314135*a(n-9) -814273096*a(n-10) +6961302814*a(n-11) -7307156292*a(n-12) -92994368*a(n-13) +3740262880*a(n-14) -1180127616*a(n-15) -466935296*a(n-16) +173254656*a(n-17) +18587648*a(n-18) -5406720*a(n-19)

EXAMPLE

Some solutions for n=4

..0..0..0..0..0....0..1..0..2..1....0..0..0..0..0....0..0..0..1..1

..0..1..0..2..1....2..2..1..1..0....0..1..0..1..1....0..2..2..0..1

..1..1..2..0..2....1..1..0..0..2....1..1..0..1..2....0..1..2..0..2

..2..0..1..1..0....0..0..2..0..0....2..1..0..1..1....1..0..2..0..1

..1..1..1..2..1....0..1..2..0..1....0..0..2..0..0....0..0..0..2..1

CROSSREFS

Sequence in context: A045060 A168471 A031844 * A168632 A230043 A045056

Adjacent sequences:  A210005 A210006 A210007 * A210009 A210010 A210011

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 16 2012

STATUS

approved

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

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

Last modified December 19 21:57 EST 2014. Contains 252240 sequences.