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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
81, 450, 450, 2500, 5916, 2500, 11100, 87902, 87902, 11100, 49284, 924132, 4133417, 924132, 49284, 192474, 9730723, 129700247, 129700247, 9730723, 192474, 751689, 80383489, 4053275322, 12449201480, 4053275322, 80383489, 751689, 2707641 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.....81......450........2500..........11100.............49284............192474

....450.....5916.......87902.........924132...........9730723..........80383489

...2500....87902.....4133417......129700247........4053275322.......93483052039

..11100...924132...129700247....12449201480.....1195654062204....83013014302681

..49284..9730723..4053275322..1195654062204...355919250720186.75777857615647618

.192474.80383489.93483052039.83013014302681.75777857615647618

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..60

EXAMPLE

Some solutions for n=2 k=4

..0..1..0..0..1....0..0..0..1..0....0..0..0..0..1....0..0..0..1..0

..0..0..1..1..2....0..1..1..2..1....0..1..2..2..2....1..1..1..1..2

..0..1..1..2..1....2..2..1..2..2....1..2..2..2..2....1..1..2..0..0

CROSSREFS

Column 1 is A204223

Sequence in context: A253375 A204230 A235441 * A253742 A204223 A205215

Adjacent sequences:  A235403 A235404 A235405 * A235407 A235408 A235409

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 10 2014

STATUS

approved

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Last modified August 19 04:02 EDT 2019. Contains 326109 sequences. (Running on oeis4.)