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A216337 Number of horizontal and antidiagonal neighbor colorings of the even squares of an nX7 array with new integer colors introduced in row major order 1

%I

%S 5,136,61915,12297870,33093354906,18383343930862,148049849072167133,

%T 166176901557427161788,2985013124775648539788601,

%U 5737167226254078112766902750,194564626464285317322710261641286

%N Number of horizontal and antidiagonal neighbor colorings of the even squares of an nX7 array with new integer colors introduced in row major order

%C Column 7 of A216338

%H R. H. Hardin, <a href="/A216337/b216337.txt">Table of n, a(n) for n = 1..17</a>

%e Some solutions for n=4

%e ..0..x..1..x..2..x..3....0..x..1..x..2..x..0....0..x..1..x..2..x..3

%e ..x..0..x..4..x..5..x....x..0..x..3..x..4..x....x..0..x..3..x..1..x

%e ..1..x..0..x..1..x..6....1..x..0..x..1..x..0....1..x..2..x..3..x..1

%e ..x..7..x..2..x..4..x....x..5..x..2..x..5..x....x..4..x..5..x..6..x

%K nonn

%O 1,1

%A _R. H. Hardin_ Sep 04 2012

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Last modified October 3 09:59 EDT 2022. Contains 357231 sequences. (Running on oeis4.)