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A235437 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the difference between each 2X2 subblock maximum and minimum lexicographically nondecreasing rowwise and columnwise 6
81, 583, 583, 3987, 10241, 3987, 26091, 169041, 169041, 26091, 167095, 2616323, 6802225, 2616323, 167095, 1054515, 39122513, 253925273, 253925273, 39122513, 1054515, 6595119, 570624077, 9047860107, 23147332121, 9047860107, 570624077 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.........81...........583............3987.............26091............167095

........583.........10241..........169041...........2616323..........39122513

.......3987........169041.........6802225.........253925273........9047860107

......26091.......2616323.......253925273.......23147332121.....2018613731175

.....167095......39122513......9047860107.....2018613731175...438547192107117

....1054515.....570624077....309625276947...168052583588803.91649890523565335

....6595119....8196586161..10293725576425.13459467429347941

...41000659..116562545251.334790471121909

..253895775.1647270158195

.1568132115

LINKS

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

FORMULA

Empirical for column k:

k=1: a(n) = 8*a(n-1) -a(n-2) -64*a(n-3) -14*a(n-4) +88*a(n-5) +8*a(n-6) -24*a(n-7)

k=2: [order 39]

EXAMPLE

Some solutions for n=2 k=4

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

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

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

CROSSREFS

Sequence in context: A236082 A235737 A236490 * A235432 A206064 A016756

Adjacent sequences:  A235434 A235435 A235436 * A235438 A235439 A235440

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 10 2014

STATUS

approved

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Last modified October 15 05:43 EDT 2019. Contains 328026 sequences. (Running on oeis4.)