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A203338 T(n,k)=Number of nXk 0..5 arrays with every nonzero element less than or equal to at least two horizontal and vertical neighbors 8
1, 1, 1, 1, 6, 1, 1, 36, 36, 1, 1, 161, 1311, 161, 1, 1, 846, 27056, 27056, 846, 1, 1, 5545, 532547, 2224079, 532547, 5545, 1, 1, 35483, 12872510, 156011082, 156011082, 12872510, 35483, 1, 1, 216488, 327579980, 12492984999, 40063085907, 12492984999 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

Table starts

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

.1......6.........36............161................846.................5545

.1.....36.......1311..........27056.............532547.............12872510

.1....161......27056........2224079..........156011082..........12492984999

.1....846.....532547......156011082........40063085907.......11409771585523

.1...5545...12872510....12492984999.....11409771585523....11867803667695158

.1..35483..327579980..1066362412766...3356615719680977.12521002071185162318

.1.216488.8009744714.89890925664626.978786459361069636

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..83

EXAMPLE

Some solutions for n=4 k=3

..1..4..4....1..5..5....3..3..0....5..5..1....1..1..1....4..4..0....5..5..0

..3..5..5....3..5..5....4..4..4....5..5..1....2..2..1....4..4..1....5..5..3

..3..5..5....3..0..3....4..1..4....3..3..1....2..3..3....5..5..5....3..5..5

..0..0..0....3..3..3....4..4..4....0..1..1....0..3..3....5..5..5....0..5..5

CROSSREFS

Sequence in context: A022169 A156601 A178232 * A158116 A172343 A058875

Adjacent sequences:  A203335 A203336 A203337 * A203339 A203340 A203341

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Dec 31 2011

STATUS

approved

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Last modified October 17 08:36 EDT 2019. Contains 328107 sequences. (Running on oeis4.)