login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
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 11

%I #5 Mar 31 2012 12:37:18

%S 2,4,4,6,16,6,10,36,36,9,16,100,84,81,14,26,256,292,198,196,22,42,676,

%T 912,870,474,484,35,68,1764,2812,3358,2774,1140,1225,56,110,4624,8928,

%U 12040,13902,9060,2748,3136,90,178,12100,28152,47320,55752,60762,30440

%N 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

%C Table starts

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

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

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

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

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

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

%C .35.1225.2748..30440..284108.1296732.12327618..111194040..568720390..5097396968

%C .56.3136.6630.103838.1384420.6454684.87753008.1144562438.5955572036.76412972266

%H R. H. Hardin, <a href="/A207661/b207661.txt">Table of n, a(n) for n = 1..420</a>

%e Some solutions for n=4 k=3

%e ..0..1..1....0..1..0....0..1..1....1..1..0....0..0..1....0..1..1....1..0..0

%e ..1..0..0....1..1..0....1..0..0....1..0..1....1..1..0....1..1..0....0..1..1

%e ..0..1..1....1..0..0....0..1..1....0..1..1....1..0..1....1..0..1....1..0..0

%e ..1..1..0....0..1..0....1..0..1....1..1..0....1..1..0....0..1..1....0..1..1

%Y Column 1 is A001611(n+2)

%Y Column 2 is A207436

%Y Row 1 is A006355(n+2)

%Y Row 2 is A206981

%Y Row 3 is A207341

%K nonn,tabl

%O 1,1

%A _R. H. Hardin_ Feb 19 2012

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 19 09:23 EDT 2024. Contains 371782 sequences. (Running on oeis4.)