A207269 - OEIS

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A207269

T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 and 0 1 1 horizontally and 0 1 1 and 1 0 1 vertically

2, 4, 4, 6, 16, 6, 9, 36, 36, 9, 13, 81, 82, 81, 14, 18, 169, 217, 193, 196, 21, 25, 324, 499, 611, 488, 441, 31, 34, 625, 1014, 1602, 1910, 1087, 961, 46, 46, 1156, 2141, 3513, 5904, 5132, 2305, 2116, 68, 62, 2116, 4188, 8327, 14184, 18055, 13067, 4932, 4624, 100, 83

(list; table; graph; refs; listen; history; text; internal format)

OFFSET

1,1

COMMENTS

Table starts

..2....4....6.....9.....13.....18......25......34.......46.......62.......83

..4...16...36....81....169....324.....625....1156.....2116.....3844.....6889

..6...36...82...217....499...1014....2141....4188.....8150....15670....29517

..9...81..193...611...1602...3513....8327...17568....36988....76723...153865

.14..196..488..1910...5904..14184...38911...90670...211626...485438..1060958

.21..441.1087..5132..18055..45520..140295..349415...877101..2164569..5025447

.31..961.2305.13067..52240.135686..467686.1233127..3284096..8655283.21076355

.46.2116.4932.33937.156473.417772.1623957.4556171.12881467.36421182.93059536

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..881

EXAMPLE

Some solutions for n=4 k=3

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

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

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

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

CROSSREFS

Column 1 is A038718(n+2)

Column 2 is A207069

Row 1 is A171861(n+1)

Row 2 is A207025

Sequence in context: A207879 A207682 A207488 * A207885 A207762 A207368

Adjacent sequences: A207266 A207267 A207268 * A207270 A207271 A207272

KEYWORD

nonn,tabl

AUTHOR

R. H. Hardin Feb 16 2012

STATUS

approved