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 A198640 Number of 2nX6 0..2 arrays with values 0..2 introduced in row major order and each element equal to an even number of horizontal and vertical neighbors 1

%I #5 Mar 31 2012 12:36:34

%S 376,162776,70145916,30189380016,13004327687556,5601924832399656,

%T 2413172096267222836,1039537719846439186376,447808510571760655158776,

%U 192905432626763894473193096,83099149713982969238814113576

%N Number of 2nX6 0..2 arrays with values 0..2 introduced in row major order and each element equal to an even number of horizontal and vertical neighbors

%C Column 3 of A198642

%H R. H. Hardin, <a href="/A198640/b198640.txt">Table of n, a(n) for n = 1..94</a>

%e Some solutions for n=2

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Oct 27 2011

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Last modified April 21 17:36 EDT 2024. Contains 371874 sequences. (Running on oeis4.)