|
%I #5 Mar 31 2012 12:35:55
%S 4,8,14,26,46,86,158,302,574,1118,2174,4286,8446,16766,33278,66302,
%T 132094,263678
%N 1/4 the number of (n+1)X(n+1) binary arrays with all 2X2 subblock sums the same
%C Diagonal of A183986
%e Some solutions for 5X5
%e ..1..0..1..0..1....0..1..0..1..0....1..1..1..1..1....0..1..1..0..1
%e ..1..0..1..0..1....1..0..1..0..1....0..1..0..1..0....1..0..0..1..0
%e ..0..1..0..1..0....1..0..1..0..1....1..1..1..1..1....0..1..1..0..1
%e ..1..0..1..0..1....1..0..1..0..1....1..0..1..0..1....1..0..0..1..0
%e ..0..1..0..1..0....1..0..1..0..1....1..1..1..1..1....0..1..1..0..1
%K nonn
%O 1,1
%A _R. H. Hardin_ Jan 08 2011
| 