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A238311 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the maximum minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 6
256, 1776, 1776, 12372, 20128, 12372, 85984, 227622, 227622, 85984, 601408, 2570594, 4124382, 2570594, 601408, 4181152, 29039618, 73547936, 73547936, 29039618, 4181152, 29228452, 328887234, 1325192097, 2095353404, 1325192097 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

........256..........1776............12372.............85984.............601408

.......1776.........20128...........227622...........2570594...........29039618

......12372........227622..........4124382..........73547936.........1325192097

......85984.......2570594.........73547936........2095353404........60499288444

.....601408......29039618.......1325192097.......60499288444......2819884806312

....4181152.....328887234......23867403810.....1753568482738....130981062733326

...29228452....3724943100.....431525615512....50670612949420...6096647460404574

..203246304...42156330796....7754964008116..1462889957511854.282303059762478196

.1421071696..477092412942..140102741116287.42268524829620522

.9880770000.5400733421386.2519445217835664

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..84

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 26]

k=2: [order 76]

EXAMPLE

Some solutions for n=2 k=4

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

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

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

CROSSREFS

Sequence in context: A237780 A237904 A237899 * A205944 A238306 A205937

Adjacent sequences:  A238308 A238309 A238310 * A238312 A238313 A238314

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Feb 24 2014

STATUS

approved

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Last modified October 3 04:46 EDT 2022. Contains 357230 sequences. (Running on oeis4.)