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A281657 Number of 5Xn 0..2 arrays with no element equal to more than one of its horizontal, diagonal or antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards. 1

%I #4 Jan 26 2017 07:24:34

%S 0,2894,104815,2159590,48871479,955490042,18092139475,334914604224,

%T 6058290906233,107920205083282,1899220467260750,33088963050484262,

%U 571760413613053121,9811548539803374962,167377398458564403677

%N Number of 5Xn 0..2 arrays with no element equal to more than one of its horizontal, diagonal or antidiagonal neighbors, with the exception of exactly one element, and with new values introduced in order 0 sequentially upwards.

%C Row 5 of A281653.

%H R. H. Hardin, <a href="/A281657/b281657.txt">Table of n, a(n) for n = 1..59</a>

%e Some solutions for n=3

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

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

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

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

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

%Y Cf. A281653.

%K nonn

%O 1,2

%A _R. H. Hardin_, Jan 26 2017

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Last modified April 24 18:05 EDT 2024. Contains 371962 sequences. (Running on oeis4.)