A222475 - OEIS

%I #4 Feb 21 2013 13:53:06

%S 4,10,42,235,1450,30883,267772,7073732,67911068,1835377464,

%T 17762404598,478005487727,4694125854134,124576004895424,

%U 1240340640828968,32486189811716076,327738319146833494,8473377832221877331

%N Number of nX4 0..3 arrays with no more than floor(nX4/2) elements unequal to at least one king-move neighbor, with new values introduced in row major 0..3 order

%C Column 4 of A222479

%H R. H. Hardin, <a href="/A222475/b222475.txt">Table of n, a(n) for n = 1..96</a>

%e Some solutions for n=4

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 21 2013