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 A268048 Number of nX4 0..4 arrays with every repeated value in every row unequal to, and in every column equal to, the previous repeated value, and new values introduced in row-major sequential order. 1

%I #4 Jan 25 2016 10:52:01

%S 12,3183,1650058,829256141,386602239495,168939588471080,

%T 70137880138850634,27947317545815128289,10768364145370007188272,

%U 4034957610865168347501829,1476750375062134346976725823

%N Number of nX4 0..4 arrays with every repeated value in every row unequal to, and in every column equal to, the previous repeated value, and new values introduced in row-major sequential order.

%C Column 4 of A268049.

%H R. H. Hardin, <a href="/A268048/b268048.txt">Table of n, a(n) for n = 1..17</a>

%e Some solutions for n=5

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

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

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

%e ..4..3..0..0....3..1..0..1....3..0..0..1....4..2..0..2....3..4..0..3

%e ..2..3..0..4....1..0..4..0....4..2..2..4....3..3..0..3....4..2..0..4

%Y Cf. A268049.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 25 2016

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Last modified May 29 11:55 EDT 2023. Contains 363042 sequences. (Running on oeis4.)