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A205215 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the determinants of 2X2 subblocks nondecreasing rightwards and downwards 9
81, 452, 452, 1970, 3248, 1970, 8128, 23578, 23578, 8128, 33386, 203313, 357812, 203313, 33386, 139390, 1846145, 5500266, 5500266, 1846145, 139390, 588254, 17014174, 82656765, 155765726, 82656765, 17014174, 588254, 2496440, 157776973 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

......81........452.........1970............8128.............33386

.....452.......3248........23578..........203313...........1846145

....1970......23578.......357812.........5500266..........82656765

....8128.....203313......5500266.......155765726........4357148705

...33386....1846145.....82656765......4357148705......209120030041

..139390...17014174...1236875696....126335408689....10699762239543

..588254..157776973..18436719991...3665236234914...529074884034056

.2496440.1467364433.274894006610.107599177704443.26696996142924073

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..199

EXAMPLE

Some solutions for n=4 k=3

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

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

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

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

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

CROSSREFS

Sequence in context: A235406 A253742 A204223 * A206223 A236669 A205208

Adjacent sequences:  A205212 A205213 A205214 * A205216 A205217 A205218

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Jan 23 2012

STATUS

approved

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Last modified October 16 15:51 EDT 2019. Contains 328101 sequences. (Running on oeis4.)