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A254242 T(n,k)=Number of (n+2)X(k+2) 0..1 arrays with every 3X3 subblock diagonal sum plus antidiagonal minimum nondecreasing horizontally and vertically 9
512, 2616, 2616, 10684, 9209, 10684, 41140, 38392, 38392, 41140, 150016, 167637, 195528, 167637, 150016, 514920, 637570, 970333, 970333, 637570, 514920, 1700100, 2228050, 3702284, 5606832, 3702284, 2228050, 1700100, 5487356, 7570126 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

......512......2616......10684......41140......150016......514920......1700100

.....2616......9209......38392.....167637......637570.....2228050......7570126

....10684.....38392.....195528.....970333.....3702284....13376848.....46946080

....41140....167637.....970333....5606832....21582041....80104299....277964612

...150016....637570....3702284...21582041....68909819...249684274....823990321

...514920...2228050...13376848...80104299...249684274...940766774...3047978749

..1700100...7570126...46946080..277964612...823990321..3047978749...9935634151

..5487356..24603175..151691950..863193207..2489942672..8696762202..29382711821

.17402796..77699926..473298612.2642194905..7604477491.26336306288..95953540161

.54388900.240604963.1441563263.7927642723.22672034459.78716251434.293785336653

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..284

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 36]

k=2: [order 54]for n>66

EXAMPLE

Some solutions for n=3 k=4

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

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

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

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

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

CROSSREFS

Sequence in context: A256954 A255029 A257426 * A254235 A254775 A254728

Adjacent sequences:  A254239 A254240 A254241 * A254243 A254244 A254245

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 27 2015

STATUS

approved

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Last modified January 22 16:37 EST 2020. Contains 331152 sequences. (Running on oeis4.)