A198525 - OEIS

%I #5 Mar 31 2012 12:36:34

%S 52,81844,222590953,634586561196,1814002928583853,5186266567454077293,

%T 14827770532074166305565,42393290191915767856385826,

%U 121204405622972228787863169567,346529082914494875185400399625818

%N Number of nX5 0..4 arrays with values 0..4 introduced in row major order and each element equal to no more than two horizontal and vertical neighbors

%C Column 5 of A198528

%H R. H. Hardin, <a href="/A198525/b198525.txt">Table of n, a(n) for n = 1..64</a>

%e Some solutions for n=4

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

%e ..1..1..0..1..4....1..1..0..3..1....1..1..0..3..0....1..1..0..1..2

%e ..0..0..1..2..2....0..0..1..0..3....0..0..1..0..2....0..0..1..0..4

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Oct 26 2011