A233475 - OEIS

%I #6 Aug 11 2014 22:45:56

%S 178464,8840905,432047816,21111771232,1030570080608,50306732887149,

%T 2455509770023748,119855189715624816,5850184020893059584,

%U 285550010593205974009,13937813362561049133972,680310394336994074070032

%N Number of (n+2)X(1+2) 0..3 arrays with no increasing sequence of length 3 horizontally or vertically

%C Column 1 of A233480

%H R. H. Hardin, <a href="/A233475/b233475.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A233475/a233475_1.txt">Empirical recurrence of order 54</a>

%F Empirical recurrence of order 54 (see link above)

%e Some solutions for n=1

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 11 2013