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!)
A227255 Number of n X 5 binary arrays indicating whether each 2 X 2 subblock of a larger binary array has lexicographically nondecreasing rows and columns, for some larger (n+1) X 6 binary array with rows and columns of the latter in lexicographically nondecreasing order. 1
11, 53, 450, 4578, 44379, 385212, 2925969, 19641271, 118614860, 654214381, 3334753195, 15858202072, 70892618881, 299805425605, 1205758757487, 4632388331446, 17066069541973, 60489294799563, 206864212649513 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 5 of A227256.
LINKS
FORMULA
Empirical polynomial of degree 47 (see link above).
EXAMPLE
Some solutions for n=4
..1..1..1..0..0....1..1..1..0..1....1..1..0..0..0....1..1..1..1..1
..1..1..0..1..1....1..0..0..1..1....1..0..1..1..1....1..1..1..0..0
..1..1..1..1..1....0..1..1..0..1....1..1..1..1..1....1..1..0..0..0
..1..0..0..1..1....1..1..0..1..0....1..0..1..1..0....1..0..0..0..0
CROSSREFS
Cf. A227256.
Sequence in context: A227965 A196468 A252833 * A104291 A172495 A003867
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jul 04 2013
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 19 09:40 EDT 2024. Contains 370981 sequences. (Running on oeis4.)