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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A223145 Number of nX3 0..2 arrays with no more than floor(nX3/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order 1

%I #4 Mar 16 2013 06:15:02

%S 2,31,211,4065,23376,487176,2859044,61675900,371133369,8139180914,

%T 49841557459,1103204549801,6833901039820,152165504230294,

%U 950031309571622,21243203251932990,133380148664076565,2991998436727716610

%N Number of nX3 0..2 arrays with no more than floor(nX3/2) elements equal to at least one horizontal, vertical or antidiagonal neighbor, with new values introduced in row major 0..2 order

%C Column 3 of A223149

%H R. H. Hardin, <a href="/A223145/b223145.txt">Table of n, a(n) for n = 1..157</a>

%e Some solutions for n=3

%e ..0..1..2....0..1..0....0..1..2....0..1..2....0..1..2....0..1..2....0..1..2

%e ..2..1..0....1..2..0....2..0..0....2..0..1....1..1..0....1..0..2....2..2..2

%e ..0..2..0....0..1..2....1..0..1....1..2..0....0..2..1....2..1..0....0..1..0

%K nonn

%O 1,1

%A _R. H. Hardin_ Mar 16 2013

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.

Last modified April 16 16:49 EDT 2024. Contains 371749 sequences. (Running on oeis4.)