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Number of (n+2)X6 0..7 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order
1

%I #5 Mar 31 2012 12:36:01

%S 212298419684,41910604337378,4772160687307074,378372621022753476,

%T 22687513754718781985,1081599389409258559731,42451419931252675522287,

%U 1407901157465200331154523,40264870455486645310499349

%N Number of (n+2)X6 0..7 arrays with each 3X3 subblock having rows and columns in lexicographically nondecreasing order

%C Column 4 of A185435

%H R. H. Hardin, <a href="/A185430/b185430.txt">Table of n, a(n) for n = 1..114</a>

%e Some solutions for 4X6

%e ..0..0..0..0..0..2....0..0..0..0..0..6....0..0..0..0..0..3....0..0..0..0..0..1

%e ..0..0..0..0..0..6....0..0..0..0..1..2....0..0..0..0..0..6....0..0..0..0..0..4

%e ..0..0..0..0..1..2....0..0..0..0..1..5....0..0..0..0..2..3....0..0..0..0..0..4

%e ..0..0..0..0..1..4....0..0..0..0..2..2....0..0..0..0..3..6....0..0..0..0..7..3

%K nonn

%O 1,1

%A _R. H. Hardin_ Jan 27 2011