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!)
A203450 Number of (n+1)X7 0..1 arrays with column and row pair sums b(i,j)=a(i,j)+a(i,j-1) and c(i,j)=a(i,j)+a(i-1,j) such that rows of b(i,j) and columns of c(i,j) are lexicographically nondecreasing 1
256, 786, 13777, 265581, 5972476, 125140148, 2396938985, 41222650083, 637232759390, 8897124488034, 112983830198944, 1314391834428984, 14104514485212071, 140489745680450603, 1306284213152732426 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Column 6 of A203452

LINKS

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

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A237008 A045057 A195091 * A188248 A253822 A258733

Adjacent sequences:  A203447 A203448 A203449 * A203451 A203452 A203453

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 02 2012

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 26 10:50 EDT 2022. Contains 354881 sequences. (Running on oeis4.)