A185484 - OEIS

%I #9 Oct 03 2025 03:01:31

%S 1832,73094,1923780,59486818,1723639416,51354095605,1513130455943,

%T 44794190542169,1323525925470463,39137379574959336,

%U 1156933531645734032,34204609315029971150,1011198353006650460242,29894979888370298618687

%N Number of (n+1)X7 binary arrays with every 2X2 subblock determinant equal to some horizontal or vertical neighbor 2X2 subblock determinant.

%C Column 6 of A185487

%H R. H. Hardin, <a href="/A185484/b185484.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for 3X7

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Jan 28 2011