A268007 - OEIS

%I #5 Jan 24 2016 09:25:25

%S 4,159,7445,381958,18691624,911680225,43653230106,2074179818184,

%T 97646068246936,4569116947346091,212625847203245237,

%U 9853280365275338623,455001756707087106187,20951793886914002899807,962541121729004548522176

%N Number of nX3 0..3 arrays with every repeated value in every row and column unequal to the previous repeated value, and new values introduced in row-major sequential order.

%C Column 3 of A268009.

%H R. H. Hardin, <a href="/A268007/b268007.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A268007/a268007.txt">Empirical recurrence of order 75</a>

%F Empirical recurrence of order 75 (see link above)

%e Some solutions for n=3

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

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

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

%Y Cf. A268009.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 24 2016