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A252368 Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 3 4 6 or 7 1

%I #4 Dec 17 2014 08:12:12

%S 6954,48034,427362,3482672,28210122,230366506,1875961304,15268178994,

%T 124565591414,1015416647500,8271100837250,67392594686378,

%U 549259163334800,4476243984230410,36476070305839416,297235618071643728

%N Number of (n+2)X(7+2) 0..3 arrays with every 3X3 subblock row, column, diagonal and antidiagonal sum not equal to 1 3 4 6 or 7

%C Column 7 of A252369

%H R. H. Hardin, <a href="/A252368/b252368.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

%e ..3..2..3..3..3..3..3..3..2....0..0..0..0..0..0..0..0..2

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

%e ..3..3..2..3..3..3..3..3..3....2..0..0..2..0..0..0..0..0

%e ..3..3..3..3..3..3..3..2..3....0..0..0..0..0..0..0..0..2

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 17 2014

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Last modified April 24 13:38 EDT 2024. Contains 371957 sequences. (Running on oeis4.)