A185493 - OEIS

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

%S 380,20872,559188,17217132,512228678,15557758676,468319269164,

%T 14183811777874,428304663870360,12959263249428942,391713900336756640,

%U 11848007350522546976,358238177899901779648,10834146701839281093716

%N Number of (n+1)X6 binary arrays with every 2X2 subblock sum equal to some horizontal or vertical neighbor 2X2 subblock sum

%C Column 5 of A185497

%H R. H. Hardin, <a href="/A185493/b185493.txt">Table of n, a(n) for n = 1..45</a>

%e Some solutions for 4X6

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 29 2011