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A237574 T(n,k)=Number of (n+1)X(k+1) 0..3 arrays with the upper median minus the lower median of every 2X2 subblock differing from its horizontal and vertical neighbors by exactly one 6
256, 1876, 1876, 13924, 24332, 13924, 103264, 315664, 315664, 103264, 769680, 4146324, 7379204, 4146324, 769680, 5705156, 54395184, 173478980, 173478980, 54395184, 5705156, 42501300, 712810024, 4093774632, 7415425124, 4093774632 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

.......256.........1876..........13924............103264...............769680

......1876........24332.........315664...........4146324.............54395184

.....13924.......315664........7379204.........173478980...........4093774632

....103264......4146324......173478980........7415425124.........313460630304

....769680.....54395184.....4093774632......313460630304.......23898935623162

...5705156....712810024....95639726868....13253873415032.....1807232491974520

..42501300...9341685548..2255748816966...561018557350096...138024943528283880

.315065200.122455823868.52746091216472.23744013911896432.10448941120238123892

LINKS

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

FORMULA

Empirical for column k:

k=1: [linear recurrence of order 14] for n>15

k=2: [order 45]

EXAMPLE

Some solutions for n=2 k=4

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

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

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

CROSSREFS

Sequence in context: A237891 A237158 A237151 * A237569 A237544 A206752

Adjacent sequences:  A237571 A237572 A237573 * A237575 A237576 A237577

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin, Feb 09 2014

STATUS

approved

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Last modified September 30 15:34 EDT 2022. Contains 357106 sequences. (Running on oeis4.)