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

%I #5 Apr 21 2015 10:39:17

%S 9300,119716,1719620,24720784,349003536,4925793856,69733153264,

%T 987300576900,13970047948904,197664647574276,2797189028575200,

%U 39584116251965476,560147800897976784,7926510787173264784

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

%C Column 1 of A257385

%H R. H. Hardin, <a href="/A257380/b257380.txt">Table of n, a(n) for n = 1..210</a>

%H R. H. Hardin, <a href="/A257380/a257380.txt">Empirical recurrence of order 81</a>

%F Empirical recurrence of order 81 (see link above)

%e Some solutions for n=2

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

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

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

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

%Y Cf. A257385

%K nonn

%O 1,1

%A _R. H. Hardin_, Apr 21 2015