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!)
A204733 Number of (n+1)X(n+1) 0..1 arrays with rows and columns of permanents of all 2X2 subblocks lexicographically nondecreasing, and all 2X2 permanents nonzero 0
7, 43, 409, 6176, 150132, 5920734, 384523522, 42202897239, 8122473947642, 2916065637047374 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A204740

LINKS

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

EXAMPLE

Some solutions for n=4

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

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

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

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

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

CROSSREFS

Sequence in context: A292502 A294361 A345075 * A195230 A316635 A222981

Adjacent sequences:  A204730 A204731 A204732 * A204734 A204735 A204736

KEYWORD

nonn

AUTHOR

R. H. Hardin Jan 18 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 September 26 06:16 EDT 2021. Contains 347664 sequences. (Running on oeis4.)