A204799 - OEIS

%I #5 Mar 31 2012 12:37:03

%S 6740,353975,11096511,398104735,13302221086,457771763592,

%T 15605413576718,534307699718747,18258851926447654,624736415868591570,

%U 21375044526088828740,731601924414291239552,25041175446627781497200

%N Number of (n+1)X8 0..1 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing

%C Column 7 of A204800

%H R. H. Hardin, <a href="/A204799/b204799.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=4

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 19 2012