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A202988 T(n,k)=Number of nXk 0..2 arrays with every nonzero element less than or equal to some NW, E or S neighbor 8
1, 1, 1, 1, 9, 1, 1, 63, 63, 1, 1, 323, 1233, 323, 1, 1, 1629, 16854, 16854, 1629, 1, 1, 8534, 239196, 595202, 239196, 8534, 1, 1, 44885, 3557168, 21925060, 21925060, 3557168, 44885, 1, 1, 234728, 52328419, 838636921, 2075667829, 838636921, 52328419 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,5

COMMENTS

Table starts

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

.1......9........63...........323.............1629................8534

.1.....63......1233.........16854...........239196.............3557168

.1....323.....16854........595202.........21925060...........838636921

.1...1629....239196......21925060.......2075667829........206497187067

.1...8534...3557168.....838636921.....206497187067......54374200726981

.1..44885..52328419...31806596079...20459663726506...14227778139316647

.1.234728.764541713.1202034287472.2017022464973722.3693790499807299502

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..220

EXAMPLE

Some solutions for n=4 k=3

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

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

..2..2..2....0..2..2....2..2..2....0..2..2....0..2..2....0..2..2....2..2..2

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

CROSSREFS

Sequence in context: A304321 A156278 A166961 * A098436 A022172 A173005

Adjacent sequences:  A202985 A202986 A202987 * A202989 A202990 A202991

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Dec 26 2011

STATUS

approved

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Last modified May 24 17:09 EDT 2019. Contains 323533 sequences. (Running on oeis4.)