login
This site is supported by donations to The OEIS Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A227088 Number of nX5 binary arrays indicating whether each 2X2 subblock of a larger binary array has lexicographically increasing rows and columns, for some larger (n+1)X6 binary array with rows and columns of the latter in lexicographically nondecreasing order 1
16, 122, 842, 5517, 34862, 210279, 1198995, 6435794, 32506602, 154792049, 697073117, 2979286263, 12129141182, 47200560835, 176145560948, 632250821238, 2188584143256, 7323870287583, 23744538586763, 74727529131117 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 5 of A227089

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..210

R. H. Hardin, Empirical polynomial of degree 47

FORMULA

Empirical polynomial of degree 47 (see link above)

EXAMPLE

Some solutions for n=4

..0..0..1..0..0....0..1..0..1..0....1..0..0..0..0....0..1..1..0..0

..0..1..1..0..0....1..1..0..0..1....0..1..1..0..0....1..1..0..0..1

..1..1..0..0..0....1..0..1..0..0....0..0..0..1..1....0..0..0..0..0

..0..0..0..1..0....0..0..0..1..0....0..0..0..0..0....0..0..0..0..1

CROSSREFS

Sequence in context: A191484 A030508 A006215 * A060633 A125353 A126511

Adjacent sequences:  A227085 A227086 A227087 * A227089 A227090 A227091

KEYWORD

nonn

AUTHOR

R. H. Hardin Jun 30 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified December 15 09:05 EST 2019. Contains 329995 sequences. (Running on oeis4.)