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!)
A186939 T(n,k) = Number of (n+1) X (k+1) binary arrays with every 2 X 2 subblock trace equal to exactly one or two horizontal and vertical neighbor 2 X 2 subblock traces. 9
0, 24, 24, 40, 104, 40, 144, 472, 472, 144, 344, 1664, 1840, 1664, 344, 1000, 6848, 10496, 10496, 6848, 1000, 2688, 27272, 46960, 59720, 46960, 27272, 2688, 7528, 108128, 241320, 400192, 400192, 241320, 108128, 7528, 20648, 431656, 1152312 (list; table; graph; refs; listen; history; text; internal format)
OFFSET
1,2
COMMENTS
Table starts
.....0......24........40........144..........344..........1000...........2688
....24.....104.......472.......1664.........6848.........27272.........108128
....40.....472......1840......10496........46960........241320........1152312
...144....1664.....10496......59720.......400192.......2504264.......16124472
...344....6848.....46960.....400192......3026432......25314744......199197496
..1000...27272....241320....2504264.....25314744.....264604776.....2731872328
..2688..108128...1152312...16124472....199197496....2731872328....35582947920
..7528..431656...5769904..102475864...1627815216...28477050608...475637108896
.20648.1719312..28108104..654285152..12959411184..295182600552..6259259510232
.57040.6845968.138858120.4168475512.105094646680.3063267862112.83202139545720
LINKS
EXAMPLE
Some solutions for 5 X 4
..1..1..1..0....0..1..0..1....1..1..1..0....0..0..1..1....0..0..0..1
..1..1..1..1....1..1..0..0....0..1..1..0....0..1..1..0....0..0..0..0
..1..0..0..0....0..1..1..0....0..0..0..0....0..1..1..0....1..1..1..0
..1..0..0..0....0..1..1..1....1..0..0..0....1..1..1..0....1..0..1..1
..0..0..1..1....1..1..0..1....0..0..1..1....0..1..1..0....1..0..1..1
CROSSREFS
Column 1 is A185742.
Sequence in context: A099543 A188311 A185497 * A185750 A040553 A183008
KEYWORD
nonn,tabl
AUTHOR
R. H. Hardin Mar 01 2011
STATUS
approved

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 March 1 20:05 EST 2024. Contains 370443 sequences. (Running on oeis4.)