login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A204793 Number of (n+1)X(n+1) 0..1 arrays with rows and columns of determinants of all 2X2 subblocks lexicographically nondecreasing 0
16, 240, 6537, 422426, 60519533, 20321241222, 15605413576718, 27766411206607643, 112893571720052223367, 1058197232959093882740859 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A204800

LINKS

Table of n, a(n) for n=1..10.

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A170735 A058667 A005619 * A173605 A175720 A342031

Adjacent sequences:  A204790 A204791 A204792 * A204794 A204795 A204796

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 19 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified August 4 18:15 EDT 2021. Contains 346455 sequences. (Running on oeis4.)