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!)
A250950 Number of (n+1)X(n+1) 0..1 arrays with no 2X2 subblock having its maximum diagonal element less than its minimum antidiagonal element 1
15, 392, 36016, 11633448, 13211127617, 52746349035592, 740399698245965774, 36539401198968631193728, 6339835499950780464168370698, 3867371786117427361119320198505328 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Diagonal of A250956

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..19

EXAMPLE

Some solutions for n=3

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

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

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

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

CROSSREFS

Sequence in context: A069990 A157581 A143001 * A323838 A278981 A279133

Adjacent sequences:  A250947 A250948 A250949 * A250951 A250952 A250953

KEYWORD

nonn

AUTHOR

R. H. Hardin, Nov 28 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 | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified January 22 02:46 EST 2022. Contains 350481 sequences. (Running on oeis4.)