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A252256 Number of (n+2)X(n+2) 0..3 arrays with every 3X3 subblock row and column sum not equal to 0 2 3 6 or 7 and every 3X3 diagonal and antidiagonal sum equal to 0 2 3 6 or 7 0

%I

%S 1072,1016,596,1316,3530,9836,33218,252162,1017410,4251650,95453186,

%T 461119490,2176843778,165104582658,884163477506,4458176053250

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

%C Diagonal of A252260

%e Some solutions for n=4

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

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

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

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

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

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

%K nonn

%O 1,1

%A _R. H. Hardin_, Dec 16 2014

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Last modified January 25 16:01 EST 2022. Contains 350572 sequences. (Running on oeis4.)