A267930 - OEIS

%I #4 Jan 22 2016 10:07:53

%S 60,3600,178068,8459154,376812420,16109362560,663451196118,

%T 26507885328672,1031599522028772,39244717326244854,

%U 1463429227285701348,53613261264275522982,1933276790525967340428,68725772580648925008792

%N Number of nX3 0..3 arrays with every repeated value in every row and column greater than the previous repeated value.

%C Column 3 of A267933.

%H R. H. Hardin, <a href="/A267930/b267930.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A267930/a267930.txt">Empirical recurrence of order 81</a>

%F Empirical recurrence of order 81 (see link above)

%e Some solutions for n=3

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

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

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

%Y Cf. A267933.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 22 2016