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A252646 Number of (6+2)X(n+2) 0..3 arrays with every 3X3 subblock row and diagonal sum equal to 0 3 4 6 or 7 and every 3X3 column and antidiagonal sum not equal to 0 3 4 6 or 7 1

%I #4 Dec 19 2014 11:38:47

%S 8697,80304,527688,1504636,13960830,101563107,285228944,2776390358,

%T 21175538956,58008774228,586593841540,4606891532120,12388292691364,

%U 128443852892522,1028150276840443,2729177669793740,28762008758881404

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

%C Row 6 of A252640

%H R. H. Hardin, <a href="/A252646/b252646.txt">Table of n, a(n) for n = 1..210</a>

%e Some solutions for n=2

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

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

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 19 2014

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Last modified April 25 01:35 EDT 2024. Contains 371964 sequences. (Running on oeis4.)