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 A283662 Number of nX4 0..1 arrays with no element unequal to more than four of its king-move neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards. 1

%I

%S 0,0,403,11886,165152,1712052,15351085,126810474,989755263,7421134282,

%T 53972500634,383258656118,2669593728208,18301919622500,

%U 123810569805676,828107771754630,5484831030514008,36019172324299540,234771330638001725

%N Number of nX4 0..1 arrays with no element unequal to more than four of its king-move neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

%C Column 4 of A283666.

%H R. H. Hardin, <a href="/A283662/b283662.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A283662/a283662.txt">Empirical recurrence of order 84</a>

%F Empirical recurrence of order 84 (see link above)

%e Some solutions for n=4

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

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

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

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

%Y Cf. A283666.

%K nonn

%O 1,3

%A _R. H. Hardin_, Mar 13 2017

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Last modified August 9 13:57 EDT 2020. Contains 336323 sequences. (Running on oeis4.)