The OEIS mourns the passing of Jim Simons and is grateful to the Simons Foundation for its support of research in many branches of science, including the OEIS.
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!)
A235420 Number of (n+1)X(4+1) 0..2 arrays with 2X2 subblock sum of squares lexicographically nondecreasing rowwise and nonincreasing columnwise 1
9504, 543946, 33361964, 1782209164, 94717997107, 4225274664375, 190528055285203, 7249712636712619, 281101937356383963, 9327004899765220720, 316252724455345595134, 9306235681834123612150, 279837916042101514803656 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 4 of A235421
LINKS
EXAMPLE
Some solutions for n=1
..2..2..0..0..0....0..2..2..0..0....2..1..0..0..0....2..0..1..0..1
..2..2..1..1..1....2..2..0..2..0....1..1..0..0..0....0..1..0..1..0
CROSSREFS
Sequence in context: A139676 A291209 A235424 * A236281 A282228 A084687
KEYWORD
nonn
AUTHOR
R. H. Hardin, Jan 10 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 June 15 19:43 EDT 2024. Contains 373410 sequences. (Running on oeis4.)