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A258604 Number of (n+2)X(n+2) 0..2 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum or central row sum less than the central column sum 1

%I #5 Jun 05 2015 10:05:17

%S 7500,567009,8093970,26101881,49848864,125328025,298341960,718508025,

%T 1487084440,3114086416,5819271930,11046430404,19155054072,33797513281,

%U 55343787840,92261025025,144373839480,229977793600,346828695130

%N Number of (n+2)X(n+2) 0..2 arrays with no 3x3 subblock diagonal sum less than the antidiagonal sum or central row sum less than the central column sum

%C Diagonal of A258612

%H R. H. Hardin, <a href="/A258604/b258604.txt">Table of n, a(n) for n = 1..24</a>

%e Some solutions for n=1

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

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

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

%Y Cf. A258612

%K nonn

%O 1,1

%A _R. H. Hardin_, Jun 05 2015

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Last modified April 24 20:08 EDT 2024. Contains 371963 sequences. (Running on oeis4.)