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A237904 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum plus the upper median minus the minimum of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 6
256, 1768, 1768, 12441, 21410, 12441, 88964, 265306, 265306, 88964, 636720, 3351086, 5825366, 3351086, 636720, 4539422, 42195634, 130240640, 130240640, 42195634, 4539422, 32392585, 529992314, 2894506130, 5180304200, 2894506130 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.........256..........1768..........12441...........88964..........636720

........1768.........21410.........265306.........3351086........42195634

.......12441........265306........5825366.......130240640......2894506130

.......88964.......3351086......130240640......5180304200....204201919828

......636720......42195634.....2894506130....204201919828..14245150393666

.....4539422.....529992314....64281925312...8050312460472.994081770428554

....32392585....6659762642..1428716811643.317615484901450

...231168380...83778337524.31771479675504

..1651386880.1053822365410

.11781707484

LINKS

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

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 40] for n>41

EXAMPLE

Some solutions for n=2 k=4

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

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

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

CROSSREFS

Sequence in context: A238049 A237785 A237780 * A237899 A238311 A205944

Adjacent sequences:  A237901 A237902 A237903 * A237905 A237906 A237907

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Feb 15 2014

STATUS

approved

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Last modified August 10 22:36 EDT 2022. Contains 356046 sequences. (Running on oeis4.)