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 A183983 1/4 the number of (n+1)X7 binary arrays with all 2X2 subblock sums the same 1

%I

%S 45,47,50,56,66,86,122,194,330,602,1130,2186,4266,8426,16682,33194,

%T 66090,131882,263210,525866,1050666,2100266,4198442,8394794,16785450,

%U 33566762,67125290,134242346,268468266,536920106,1073807402,2147581994,4295098410

%N 1/4 the number of (n+1)X7 binary arrays with all 2X2 subblock sums the same

%C Column 6 of A183986

%H R. H. Hardin, <a href="/A183983/b183983.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for 5X7

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 08 2011

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