This site is supported by donations to The OEIS Foundation.

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!)
 A206209 Number of (n+1)X3 0..2 arrays with every 2X3 or 3X2 subblock having exactly two equal edges, and new values 0..2 introduced in row major order 1
 45, 130, 336, 992, 2996, 9072, 27656, 84152, 256416, 781232, 2379776, 7251312, 22090736, 67305392, 205057296, 624739472, 1903397456, 5799009552, 17667779216, 53828031632, 163996770576, 499645981712, 1522260939536, 4637843595792 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 2 of A206215 LINKS R. H. Hardin, Table of n, a(n) for n = 1..210 FORMULA Empirical: a(n) = a(n-1) +6*a(n-2) +4*a(n-3) -10*a(n-4) for n>6 EXAMPLE Some solutions for n=4 ..0..0..0....0..1..2....0..1..1....0..1..0....0..0..1....0..1..1....0..1..2 ..1..2..1....0..0..1....0..2..0....2..0..0....0..2..0....1..2..1....0..0..1 ..1..0..1....1..0..0....0..1..0....0..0..1....2..0..0....1..1..2....1..0..0 ..1..2..1....0..2..0....0..2..0....0..1..2....0..0..2....2..1..1....2..1..1 ..0..0..0....0..0..1....0..1..0....1..2..2....0..2..1....1..2..2....1..1..2 CROSSREFS Sequence in context: A140369 A044296 A044677 * A098924 A195318 A131011 Adjacent sequences:  A206206 A206207 A206208 * A206210 A206211 A206212 KEYWORD nonn AUTHOR R. H. Hardin Feb 04 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 .