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A251158 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with no 2X2 subblock having the minimum of its diagonal elements greater than the absolute difference of its antidiagonal elements 9
65, 470, 470, 3374, 8407, 3374, 24233, 148833, 148833, 24233, 173990, 2644832, 6441563, 2644832, 173990, 1249276, 46958048, 280327551, 280327551, 46958048, 1249276, 8969854, 833966807, 12175291327, 29975340928, 12175291327, 833966807 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

......65.........470...........3374.............24233...............173990

.....470........8407.........148833...........2644832.............46958048

....3374......148833........6441563.........280327551..........12175291327

...24233.....2644832......280327551.......29975340928........3196108892595

..173990....46958048....12175291327.....3196108892595......835576868190958

.1249276...833966807...529076339144...341101055365828...218733576114347625

.8969854.14810089440.22986742140730.36393433887011865.57234316992797718831

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..179

FORMULA

Empirical for column k:

k=1: a(n) = 7*a(n-1) +4*a(n-2) -20*a(n-3) +3*a(n-4) +8*a(n-5) -4*a(n-6)

k=2: [order 16]

k=3: [order 37]

EXAMPLE

Some solutions for n=2 k=4

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

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

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

CROSSREFS

Sequence in context: A218845 A219424 A020292 * A251151 A222588 A286612

Adjacent sequences:  A251155 A251156 A251157 * A251159 A251160 A251161

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Nov 30 2014

STATUS

approved

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Last modified January 26 23:05 EST 2020. Contains 331289 sequences. (Running on oeis4.)