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T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with each row and column divisible by 11, read as a base-3 number with top and left being the most significant digits.
3

%I #3 Oct 15 2015 06:46:22

%S 1,1,1,3,6,3,9,38,38,9,23,226,1013,226,23,51,1620,11447,11447,1620,51,

%T 133,12653,232939,614393,232939,12653,133,399,100234,5387677,38059944,

%U 38059944,5387677,100234,399,1321,805414,123078860

%N T(n,k)=Number of (n+2)X(k+2) 0..2 arrays with each row and column divisible by 11, read as a base-3 number with top and left being the most significant digits.

%C Table starts

%C ...1......1.......3........9.......23......51.......133....399.1321

%C ...1......6......38......226.....1620...12653....100234.805414

%C ...3.....38....1013....11447...232939.5387677.123078860

%C ...9....226...11447...614393.38059944

%C ..23...1620..232939.38059944

%C ..51..12653.5387677

%C .133.100234

%C .399

%F Empirical for column k:

%F k=1: [linear recurrence of order 26]

%e Some solutions for n=3 k=4

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

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

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

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

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

%K nonn,tabl

%O 1,4

%A _R. H. Hardin_, Oct 15 2015