A268048 - OEIS

%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