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A207419 T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 1 and 0 1 0 horizontally and 0 1 1 and 1 0 1 vertically 7
2, 4, 4, 6, 16, 6, 9, 36, 36, 9, 14, 81, 92, 81, 14, 21, 196, 241, 241, 196, 21, 31, 441, 720, 742, 720, 441, 31, 46, 961, 1889, 2760, 2760, 1889, 961, 46, 68, 2116, 4719, 8465, 13260, 8465, 4719, 2116, 68, 100, 4624, 12102, 24317, 50139, 50139, 24317, 12102 (list; table; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Table starts

..2....4.....6.....9.....14......21.......31........46........68........100

..4...16....36....81....196.....441......961......2116......4624......10000

..6...36....92...241....720....1889.....4719.....12102.....30414......74588

..9...81...241...742...2760....8465....24317.....73405....214117.....601411

.14..196...720..2760..13260...50139...175903....656508...2338562....7964440

.21..441..1889..8465..50139..220882...891720...3919354..16153614...62844340

.31..961..4719.24317.175903..891720..4094666..21072638..99746042..440141222

.46.2116.12102.73405.656508.3919354.21072638.129528304.721835038.3728749264

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..611

EXAMPLE

Some solutions for n=4 k=3

..1..0..0....0..1..1....0..0..0....1..0..0....1..0..1....0..1..1....0..1..1

..0..0..0....1..1..1....0..1..1....0..1..1....1..0..1....1..0..0....0..0..0

..0..1..1....0..0..0....0..0..0....0..0..0....1..0..1....0..0..0....1..0..0

..0..0..0....0..0..0....1..0..0....0..0..0....1..0..0....0..0..0....0..0..0

CROSSREFS

Column 1 is A038718(n+2)

Column 2 is A207069

Sequence in context: A208164 A207960 A207564 * A208007 A207123 A207442

Adjacent sequences:  A207416 A207417 A207418 * A207420 A207421 A207422

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Feb 17 2012

STATUS

approved

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Last modified May 17 19:26 EDT 2021. Contains 343988 sequences. (Running on oeis4.)