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A252202 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum equal to 1 3 4 6 or 7 and every 3X3 diagonal and antidiagonal sum not equal to 1 3 4 6 or 7 1

%I #5 Dec 15 2014 08:22:17

%S 2680,5178,110128,1180226,193004794,78534150994,1236950586236,

%T 2850002858757490,19061766897822615868,332041393326772519346,

%U 11522592664946008068981178,1277874485884710320427331813954

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

%C Diagonal of A252210

%H R. H. Hardin, <a href="/A252202/b252202.txt">Table of n, a(n) for n = 1..15</a>

%e Some solutions for n=3

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

%e ..0..3..1..0..0....1..0..0..1..3....0..3..1..0..3....0..1..3..0..1

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

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

%e ..3..0..1..3..3....1..3..3..1..3....0..0..1..3..3....3..1..3..3..1

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 15 2014

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Last modified April 25 10:51 EDT 2024. Contains 371967 sequences. (Running on oeis4.)