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A186061 Number of (n+2)X9 binary arrays with each 3X3 subblock having a positive determinant 1

%I

%S 60588,1206478,19416799,275207345,4584860256,72905263923,

%T 1130708781343,18130539910403,287526402899408,4535336921964336,

%U 72099241003949754,1142655253137546939,18084010448517161871,286883699606121628553

%N Number of (n+2)X9 binary arrays with each 3X3 subblock having a positive determinant

%C Column 7 of A186063

%H R. H. Hardin, <a href="/A186061/b186061.txt">Table of n, a(n) for n = 1..200</a>

%e Some solutions for 4X9

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 11 2011

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Last modified May 16 07:30 EDT 2022. Contains 353693 sequences. (Running on oeis4.)