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A199126 Number of nX1 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor 2

%I #7 Nov 01 2015 13:51:19

%S 1,1,1,3,6,5,19,37,29,124,240,182,834,1614,1198,5746,11137,8142,40336,

%T 78332,56620,287358,559134,400598,2071558,4038130,2872754,15079270,

%U 29443040,20824778,110653854,216379650,152303410,817542980,1600817660

%N Number of nX1 0..2 arrays with values 0..2 introduced in row major order, the number of instances of each value within one of each other, and no element equal to any horizontal or vertical neighbor

%C Column 1 of A199133

%H R. H. Hardin, <a href="/A199126/b199126.txt">Table of n, a(n) for n = 1..200</a>

%F Conjecture: a(3n) = A190917(n). - _R. J. Mathar_, Nov 01 2015

%e All solutions for n=5

%e ..0....0....0....0....0....0

%e ..1....1....1....1....1....1

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

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

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

%K nonn

%O 1,4

%A _R. H. Hardin_ Nov 03 2011

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Last modified March 29 08:13 EDT 2024. Contains 371265 sequences. (Running on oeis4.)