A185607 - OEIS

%I #5 Mar 31 2012 12:36:02

%S 2366,172026,4473352,173403770,5539941616,195867482580,6595709318618,

%T 227666412255534,7763071689162734,266351559937007588,

%U 9110713339567481710,312120282081615187852,10684624737086835808560,365902084298071259519514

%N Number of (n+1)X4 0..3 arrays with every 2X2 subblock determinant equal to some horizontal or vertical neighbor 2X2 subblock determinant

%C Column 3 of A185609

%H R. H. Hardin, <a href="/A185607/b185607.txt">Table of n, a(n) for n = 1..53</a>

%e Some solutions for 3X4

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 31 2011