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!)
A183771 1/32 the number of (n+1) X 9 binary arrays with equal numbers of 2 X 2 subblocks with sum mod two being 0 and 1. 1
2240, 823680, 346131968, 153876579840, 70577422755840, 33021546171494400, 15664518350357381120, 7506428481300850827264, 3625062729947846895239168, 1761398107886979915147182080, 860111024347049203759900262400 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 8 of A183772.
LINKS
EXAMPLE
Some solutions for 3 X 9:
..0..0..0..0..0..0..0..0..0....0..0..0..0..0..0..0..0..1
..0..0..1..1..0..0..0..1..0....0..1..1..1..1..0..0..1..0
..0..1..0..1..1..1..0..1..0....1..0..1..0..1..0..0..0..0
CROSSREFS
Sequence in context: A038728 A002520 A337416 * A271470 A263912 A251051
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 06 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 July 23 19:18 EDT 2024. Contains 374553 sequences. (Running on oeis4.)