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A235441 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with 2X2 subblock sums lexicographically nondecreasing rowwise and nonincreasing columnwise 4
81, 450, 450, 2500, 5295, 2500, 11100, 65497, 65497, 11100, 49284, 606279, 1762344, 606279, 49284, 192474, 5672018, 37115629, 37115629, 5672018, 192474, 751689, 42941705, 785712765, 1957598978, 785712765, 42941705, 751689, 2707641 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

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

......450........5295.........65497..........606279..........5672018

.....2500.......65497.......1762344........37115629........785712765

....11100......606279......37115629......1957598978.....105025440136

....49284.....5672018.....785712765....105025440136...14016254732529

...192474....42941705...13504013024...4689618011086.1644246638168226

...751689...326261718..235332193767.213149442840795

..2707641..2114123393.3433774399772

..9753129.13717203464

.33291180

LINKS

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

EXAMPLE

Some solutions for n=2 k=4

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

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

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

CROSSREFS

Column 1 is A204223

Sequence in context: A253749 A253375 A204230 * A235406 A253742 A204223

Adjacent sequences:  A235438 A235439 A235440 * A235442 A235443 A235444

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 10 2014

STATUS

approved

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Last modified September 15 22:10 EDT 2019. Contains 327088 sequences. (Running on oeis4.)