A232157 - OEIS

%I #5 Aug 11 2014 22:45:55

%S 8,218,1284,7770,46702,286770,1767266,10830650,66701686,410364610,

%T 2522566124,15524673872,95489164864,587352257166,3613537440642,

%U 22227593479382,136734516680534,841147631122416,5174280907720634

%N Number of nX4 0..3 arrays with every 0 next to a 1, every 1 next to a 2 and every 2 next to a 3 horizontally, vertically or antidiagonally, and no adjacent values equal

%C Column 4 of A232161

%H R. H. Hardin, <a href="/A232157/b232157.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A232157/a232157.txt">Empirical recurrence of order 94</a>

%F Empirical recurrence of order 94 (see link above)

%e Some solutions for n=5

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Nov 19 2013