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A255784 Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum 2 and no antidiagonal sum 2 and no row sum 0 and no column sum 0 1

%I #5 Mar 06 2015 12:28:51

%S 90,270,1050,5240,43838,597517,10902535,269859998,9457603649,

%T 445467783893,28246525232387,2468916391423971,294108187486101498,

%U 47388808850139510459,10427427542156971913615,3130608690589739846073241

%N Number of (n+2)X(n+2) 0..1 arrays with no 3x3 subblock diagonal sum 2 and no antidiagonal sum 2 and no row sum 0 and no column sum 0

%C Diagonal of A255792

%H R. H. Hardin, <a href="/A255784/b255784.txt">Table of n, a(n) for n = 1..19</a>

%e Some solutions for n=4

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

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

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

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

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

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

%Y Cf. A255792

%K nonn

%O 1,1

%A _R. H. Hardin_, Mar 06 2015

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Last modified April 25 16:42 EDT 2024. Contains 371989 sequences. (Running on oeis4.)