A207661 T(n,k)=Number of nXk 0..1 arrays avoiding 0 0 0 and 1 1 1 horizontally and 0 0 1 and 1 0 0 vertically.

2, 4, 4, 6, 16, 6, 10, 36, 36, 9, 16, 100, 84, 81, 14, 26, 256, 292, 198, 196, 22, 42, 676, 912, 870, 474, 484, 35, 68, 1764, 2812, 3358, 2774, 1140, 1225, 56, 110, 4624, 8928, 12040, 13902, 9060, 2748, 3136, 90, 178, 12100, 28152, 47320, 55752, 60762, 30440

Offset: 1

Author

R. H. Hardin Feb 19 2012

Keywords

• nonn
• tabl

Comments

Table starts

..2....4....6.....10......16......26.......42.........68........110.........178

..4...16...36....100.....256.....676.....1764.......4624......12100.......31684

..6...36...84....292.....912....2812.....8928......28152......87972......277292

..9...81..198....870....3358...12040....47320.....182192.....676396.....2611234

.14..196..474...2774...13902...55752...284272....1391724....6009486....29516206

.22..484.1140...9060...60762..264568..1806676...11731102...56370696...366295198

.35.1225.2748..30440..284108.1296732.12327618..111194040..568720390..5097396968

.56.3136.6630.103838.1384420.6454684.87753008.1144562438.5955572036.76412972266

Examples

			Some solutions for n=4 k=3
..0..1..1....0..1..0....0..1..1....1..1..0....0..0..1....0..1..1....1..0..0
..1..0..0....1..1..0....1..0..0....1..0..1....1..1..0....1..1..0....0..1..1
..0..1..1....1..0..0....0..1..1....0..1..1....1..0..1....1..0..1....1..0..0
..1..1..0....0..1..0....1..0..1....1..1..0....1..1..0....0..1..1....0..1..1
		

Links

• R. H. Hardin, Table of n, a(n) for n = 1..420

Crossrefs

Column 1 is A001611(n+2)

Column 2 is A207436

Row 1 is A006355(n+2)

Row 2 is A206981

Row 3 is A207341