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A280215 Number of nX5 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards. 1

%I #4 Dec 29 2016 04:03:06

%S 6,307,4382,49328,474433,4245153,36290440,298709773,2400798535,

%T 18900933338,146535311611,1121019997031,8483337931994,63591088869355,

%U 472819500109525,3490412406841210,25604337866580661,186765973876472967

%N Number of nX5 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly two elements, and with new values introduced in order 0 sequentially upwards.

%C Column 5 of A280217.

%H R. H. Hardin, <a href="/A280215/b280215.txt">Table of n, a(n) for n = 1..250</a>

%e Some solutions for n=4

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

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

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

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

%Y Cf. A280217.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 29 2016

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Last modified April 24 14:54 EDT 2024. Contains 371960 sequences. (Running on oeis4.)