A268027 - OEIS

%I #4 Jan 24 2016 14:11:22

%S 24,576,13824,295962,6042732,117582228,2205234900,40088968398,

%T 709841497188,12287419441812,208546228493724,3478737714576768,

%U 57143989099923852,925889151644801202,14817867358400405148

%N Number of 3Xn 0..2 arrays with every repeated value in every row greater than or equal to, and in every column greater than, the previous repeated value.

%C Row 3 of A268026.

%H R. H. Hardin, <a href="/A268027/b268027.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A268027/a268027.txt">Empirical recurrence of order 86</a>

%F Empirical recurrence of order 86 (see link above)

%e Some solutions for n=3

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

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

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

%Y Cf. A268026.

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 24 2016