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Number of (n+1)X(4+1) 0..7 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 21
1

%I #4 Dec 17 2013 06:15:55

%S 34416,155104,907940,6887232,57147272,530983144,5012939992,

%T 50952500976,512188465988,5479606300380,57126934560812,

%U 630600586218188,6718939422891932,75570674572025348,815496420906106884

%N Number of (n+1)X(4+1) 0..7 arrays with every 2X2 subblock having the sum of the absolute values of all six edge and diagonal differences equal to 21

%C Column 4 of A233875

%H R. H. Hardin, <a href="/A233872/b233872.txt">Table of n, a(n) for n = 1..123</a>

%e Some solutions for n=2

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 17 2013