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A251997 Number of (n+2)X(5+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 4 5 or 7 1

%I #4 Dec 12 2014 10:21:33

%S 2708560,308552418,39474106776,5058864059512,648649767997560,

%T 83204478074887540,10674144780289546954,1369370682559455572124,

%U 175674752635044616011278,22537093202446356860490010

%N Number of (n+2)X(5+2) 0..3 arrays with no row, column, diagonal or antidiagonal in any 3X3 subblock summing to 2 4 5 or 7

%C Column 5 of A252000

%H R. H. Hardin, <a href="/A251997/b251997.txt">Table of n, a(n) for n = 1..172</a>

%e Some solutions for n=1

%e ..0..0..0..0..3..3..0....0..0..0..0..0..3..0....0..0..0..0..0..3..3

%e ..0..0..0..3..3..3..0....3..0..3..0..3..0..0....3..3..0..0..3..0..3

%e ..0..3..0..0..0..0..3....0..3..3..0..0..0..3....0..0..3..3..0..3..3

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 12 2014

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Last modified April 25 08:27 EDT 2024. Contains 371964 sequences. (Running on oeis4.)