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A204309 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the sums of 2X2 subblocks nondecreasing rightwards and downwards 8
256, 2400, 2400, 22500, 51680, 22500, 162000, 1077978, 1077978, 162000, 1166400, 15057392, 47834122, 15057392, 1166400, 7157160, 209106648, 1271789125, 1271789125, 209106648, 7157160, 43917129, 2204400210, 32895567670 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.......256.........2400...........22500...........162000...........1166400

......2400........51680.........1077978.........15057392.........209106648

.....22500......1077978........47834122.......1271789125.......32895567670

....162000.....15057392......1271789125......59151473070.....2692305415538

...1166400....209106648.....32895567670....2692305415538...211637634795580

...7157160...2204400210....592113170884...78592862286558.10058642503775705

..43917129..23201606946..10499120334579.2280158782254760

.242230104.200331995906.142632804549589

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..59

EXAMPLE

Some solutions for n=4 k=3

..1..0..0..0....0..3..1..1....1..3..2..3....0..0..0..1....3..3..1..3

..0..3..1..3....2..0..2..2....1..0..0..1....2..0..3..3....0..1..2..3

..1..0..1..3....1..2..3..2....1..3..2..3....0..1..0..1....3..3..2..2

..1..3..3..1....2..1..2..2....2..3..1..3....2..1..3..3....0..2..2..3

..1..0..1..3....1..3..2..3....1..3..2..3....1..0..3..2....3..3..2..2

CROSSREFS

Sequence in context: A205027 A207300 A205020 * A235416 A235261 A236087

Adjacent sequences:  A204306 A204307 A204308 * A204310 A204311 A204312

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Jan 14 2012

STATUS

approved

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Last modified October 25 06:30 EDT 2021. Contains 348239 sequences. (Running on oeis4.)