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 A281609 Number of 6Xn 0..2 arrays with no element equal to more than one of its horizontal, diagonal or antidiagonal neighbors and with new values introduced in order 0 sequentially upwards. 1

%I #4 Jan 25 2017 10:43:50

%S 122,9188,95623,2563481,69506779,1732267694,44428349137,1138837839480,

%T 29102840547371,744335104686091,19034344218360000,486715748229292254,

%U 12445950255418792107,318255588377585182015,8138127052120466124265

%N Number of 6Xn 0..2 arrays with no element equal to more than one of its horizontal, diagonal or antidiagonal neighbors and with new values introduced in order 0 sequentially upwards.

%C Row 6 of A281605.

%H R. H. Hardin, <a href="/A281609/b281609.txt">Table of n, a(n) for n = 1..139</a>

%e Some solutions for n=3

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

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

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

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

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

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

%Y Cf. A281605.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 25 2017

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Last modified September 7 09:14 EDT 2024. Contains 375730 sequences. (Running on oeis4.)