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A237340 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum minus the minimum of every 2X2 subblock equal 8
256, 1980, 1980, 15082, 41220, 15082, 120808, 821234, 821234, 120808, 972356, 17627820, 39609294, 17627820, 972356, 7935194, 380945760, 2137181038, 2137181038, 380945760, 7935194, 65088736, 8406402902, 114598315886 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.........256.............1980................15082....................120808

........1980............41220...............821234..................17627820

.......15082...........821234.............39609294................2137181038

......120808.........17627820...........2137181038..............300627324700

......972356........380945760.........114598315886............41627000140944

.....7935194.......8406402902........6318680517398..........5948570417327342

....65088736.....187274820848......350887832861914........853258883465178716

...536949612....4212082221444....19674122669454962.....123366442531682683412

..4446049514...95349805566302..1108527743646628762...17883818961748533773410

.36942292664.2169810608997912.62708450627429169774.2598541529967055129095912

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..112

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 12]

k=2: [order 25]

k=3: [order 59]

EXAMPLE

Some solutions for n=2 k=4

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

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

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

CROSSREFS

Sequence in context: A205370 A205659 A205363 * A237333 A221487 A014711

Adjacent sequences:  A237337 A237338 A237339 * A237341 A237342 A237343

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Feb 06 2014

STATUS

approved

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Last modified September 28 16:27 EDT 2021. Contains 347716 sequences. (Running on oeis4.)