login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A187135 Number of (n+1)X5 0..2 arrays with every 2X2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2X2 subblock traces 1
3249, 182214, 5755698, 201302208, 7020258336, 245891941002, 8616423081600, 301728175130790, 10570455159698376, 370183320491626512, 12967430068901756304, 454182945213312573174, 15908967753084162698652 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 4 of A187140

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..200

EXAMPLE

Some solutions for 4X5

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

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

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

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

CROSSREFS

Sequence in context: A235412 A048421 A238254 * A185840 A251501 A106722

Adjacent sequences:  A187132 A187133 A187134 * A187136 A187137 A187138

KEYWORD

nonn

AUTHOR

R. H. Hardin Mar 05 2011

STATUS

approved

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified October 20 21:30 EDT 2020. Contains 337909 sequences. (Running on oeis4.)