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A280123 Number of nX7 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. 0

%I #3 Dec 26 2016 07:59:32

%S 36,776,11249,171100,2433834,33510642,454149404,6104734752,

%T 81402597805,1075306882708,14114438688517

%N Number of nX7 0..2 arrays with no element unequal to a strict majority of its horizontal, vertical and antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

%C Column 7 of A280124.

%e Some solutions for n=4

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

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

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

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

%Y Cf. A280124.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 26 2016

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)