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A236427 T(n,k)=Number of (n+1)X(k+1) 0..2 arrays with the sum of each 2X2 subblock two extreme terms minus its two median terms lexicographically nondecreasing columnwise and nonincreasing rowwise 4
81, 487, 487, 2581, 5772, 2581, 12373, 60193, 60193, 12373, 55929, 544380, 1290539, 544380, 55929, 241933, 4505522, 24143945, 24143945, 4505522, 241933, 1015889, 34394854, 414682711, 987221751, 414682711, 34394854, 1015889, 4174941 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.......81........487........2581.........12373.........55929..........241933

......487.......5772.......60193........544380.......4505522........34394854

.....2581......60193.....1290539......24143945.....414682711......6480932348

....12373.....544380....24143945.....987221751...38520605664...1385464957395

....55929....4505522...414682711...38520605664.3626310504837.323039228052666

...241933...34394854..6480932348.1385464957395

..1015889..247470127.94263772244

..4174941.1692391516

.16895401

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..50

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 16]

EXAMPLE

Some solutions for n=2 k=4

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

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

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

CROSSREFS

Column 1 is A235838

Sequence in context: A236646 A205246 A205239 * A235842 A235838 A304617

Adjacent sequences:  A236424 A236425 A236426 * A236428 A236429 A236430

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Jan 25 2014

STATUS

approved

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Last modified August 19 16:39 EDT 2022. Contains 356229 sequences. (Running on oeis4.)