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A186127 Number of (n+1)X9 binary arrays with every 2X2 subblock diagonal sum less antidiagonal sum equal to some horizontal or vertical neighbor 2X2 subblock diagonal sum less antidiagonal sum 1

%I #5 Mar 31 2012 12:36:04

%S 678,14606,120290,1574348,17129792,220010616,2630528360,33067061342,

%T 411149162658,5153688541776,64828282889916,815418585280038,

%U 10288257115910818,129785918260715398,1639362506927114546

%N Number of (n+1)X9 binary arrays with every 2X2 subblock diagonal sum less antidiagonal sum equal to some horizontal or vertical neighbor 2X2 subblock diagonal sum less antidiagonal sum

%C Column 8 of A186128

%H R. H. Hardin, <a href="/A186127/b186127.txt">Table of n, a(n) for n = 1..20</a>

%e Some solutions for 3X9

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_ Feb 13 2011

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Last modified March 28 08:22 EDT 2024. Contains 371236 sequences. (Running on oeis4.)