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A229320 T(n,k)=Number of nXk 0..3 arrays of the median of the corresponding element, the element to the east and the element to the south in a larger (n+1)X(k+1) 0..3 array without adjacent equal elements in the latter 8
4, 14, 14, 50, 154, 50, 176, 1494, 1494, 176, 622, 13968, 34022, 13968, 622, 2196, 129766, 717882, 717882, 129766, 2196, 7756, 1203222, 14972226, 33330044, 14972226, 1203222, 7756, 27390, 11146054, 310664552, 1520769276, 1520769276 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.....4........14...........50.............176..............622.............2196

....14.......154.........1494...........13968...........129766..........1203222

....50......1494........34022..........717882.........14972226........310664552

...176.....13968.......717882........33330044.......1520769276......69027667944

...622....129766.....14972226......1520769276.....151503568022...14999158146398

..2196...1203222....310664552.....69027667944...14999158146398.3239971166331308

..7756..11146054...6441333794...3129534386120.1483911991489430

.27390.103236194.133479301256.141829123448362

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..71

FORMULA

Empirical for column k:

k=1: a(n) = 3*a(n-1) +2*a(n-2) -a(n-3) +2*a(n-4)

k=2: [order 65]

EXAMPLE

Some solutions for n=2 k=4

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

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

CROSSREFS

Sequence in context: A189814 A200553 A229392 * A127302 A204541 A020157

Adjacent sequences:  A229317 A229318 A229319 * A229321 A229322 A229323

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Sep 19 2013

STATUS

approved

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Last modified January 17 23:51 EST 2022. Contains 350410 sequences. (Running on oeis4.)