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A203550 T(n,k)=Number of nXk 0..4 arrays with every nonzero element less than or equal to some NW, E or S neighbor 8
1, 1, 1, 1, 25, 1, 1, 430, 430, 1, 1, 4773, 32920, 4773, 1, 1, 48046, 1525965, 1525965, 48046, 1, 1, 504464, 67657718, 276550270, 67657718, 504464, 1, 1, 5448482, 3251156731, 48904258294, 48904258294, 3251156731, 5448482, 1, 1, 58647145 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

Table starts

.1........1.............1..................1.......................1

.1.......25...........430...............4773...................48046

.1......430.........32920............1525965................67657718

.1.....4773.......1525965..........276550270.............48904258294

.1....48046......67657718........48904258294..........33466433693229

.1...504464....3251156731......9344922234283.......24753202810365029

.1..5448482..158110806032...1791660443900385....18555799450636433964

.1.58647145.7562825772263.338602574128472532.13763223061933063467070

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..127

EXAMPLE

Some solutions for n=5 k=3

..0..3..4....3..2..1....3..0..0....4..0..3....3..4..1....4..4..4....1..4..0

..0..3..4....3..2..2....3..4..2....4..3..4....2..4..2....4..2..4....4..4..4

..2..1..4....3..3..4....3..4..2....4..3..4....3..4..3....4..1..0....0..1..1

..2..4..4....3..4..4....2..4..2....4..4..4....4..4..3....4..1..0....3..2..0

..4..4..4....4..4..4....1..4..4....4..4..4....1..4..3....4..4..0....3..3..0

CROSSREFS

Sequence in context: A040626 A040625 A306454 * A022188 A040636 A040637

Adjacent sequences:  A203547 A203548 A203549 * A203551 A203552 A203553

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Jan 02 2012

STATUS

approved

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Last modified February 24 22:04 EST 2020. Contains 332216 sequences. (Running on oeis4.)