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!)
A235543 Number of (n+1)X(3+1) 0..1 arrays with the sum of each 2X2 subblock two median terms lexicographically nondecreasing rowwise and columnwise 1
141, 1049, 8711, 61401, 429443, 2704866, 16395328, 93093885, 508540185, 2659704703, 13471014030, 66144806353, 316636996887, 1480951215734, 6789622700273, 30573699358527, 135511534381407, 592152291952613 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 3 of A235548
LINKS
FORMULA
Empirical recurrence of order 77 (see link above)
EXAMPLE
Some solutions for n=4
..0..0..0..1....0..0..0..1....0..0..0..1....1..0..1..0....0..1..0..1
..0..1..0..0....0..0..0..0....0..0..0..1....0..0..1..1....0..0..1..1
..0..0..0..1....0..0..0..1....1..0..1..0....0..1..0..1....1..0..1..0
..1..0..1..0....1..0..0..1....0..0..1..1....1..1..0..1....1..1..0..1
..1..1..1..0....0..0..0..1....1..0..1..1....1..0..1..0....1..0..1..0
CROSSREFS
Sequence in context: A186954 A235760 A201814 * A204469 A201553 A281560
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 12 2014
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 February 26 10:01 EST 2024. Contains 370339 sequences. (Running on oeis4.)