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A266044 Number of 4Xn arrays containing n copies of 0..4-1 with no element plus any vertical or antidiagonal neighbor equal to 4-1. 1

%I #6 Aug 12 2016 06:53:59

%S 8,104,2408,74416,2603736,97230000,3787995368,152165487408,

%T 6256996794664,262070255471888,11141539251200152,479536056600705392,

%U 20854033903834109000,914926763605653165712,40446653776796028311816

%N Number of 4Xn arrays containing n copies of 0..4-1 with no element plus any vertical or antidiagonal neighbor equal to 4-1.

%C Row 4 of A266042.

%H R. H. Hardin, <a href="/A266044/b266044.txt">Table of n, a(n) for n = 1..26</a>

%e Some solutions for n=4

%e ..0..2..1..3....2..1..3..2....2..1..2..2....0..3..2..3....3..3..1..1

%e ..2..0..1..2....0..1..2..3....3..3..0..0....1..3..2..2....2..1..1..0

%e ..0..1..3..3....0..0..3..1....2..1..1..1....1..3..0..0....3..0..0..2

%e ..0..1..2..3....2..1..3..0....0..0..3..3....1..2..1..0....2..2..0..3

%Y Cf. A266042.

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 20 2015

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)