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 A235406 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise 4

%I

%S 81,450,450,2500,5916,2500,11100,87902,87902,11100,49284,924132,

%T 4133417,924132,49284,192474,9730723,129700247,129700247,9730723,

%U 192474,751689,80383489,4053275322,12449201480,4053275322,80383489,751689,2707641

%N T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with 2X2 subblock sums lexicographically nondecreasing columnwise and rowwise

%C Table starts

%C .....81......450........2500..........11100.............49284............192474

%C ....450.....5916.......87902.........924132...........9730723..........80383489

%C ...2500....87902.....4133417......129700247........4053275322.......93483052039

%C ..11100...924132...129700247....12449201480.....1195654062204....83013014302681

%C ..49284..9730723..4053275322..1195654062204...355919250720186.75777857615647618

%C .192474.80383489.93483052039.83013014302681.75777857615647618

%H R. H. Hardin, <a href="/A235406/b235406.txt">Table of n, a(n) for n = 1..60</a>

%e Some solutions for n=2 k=4

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

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

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

%Y Column 1 is A204223

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_, Jan 10 2014

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Last modified October 22 08:00 EDT 2019. Contains 328315 sequences. (Running on oeis4.)