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!)
A187621 Number of (n+1)X(n+1) 0..1 arrays with each 2X2 non-center subblock determinant nonzero and the array of 2X2 subblock determinants antisymmetric under 90 degree rotation 0
10, 24, 2, 948, 36, 190972, 3020, 194618700, 929380, 1018751442652, 1744283776, 27189851221308572, 15262275217840 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Column 1 of A187624
LINKS
EXAMPLE
All solutions for 4X4
..1..1..0..1....1..0..1..1
..0..1..1..1....1..1..1..0
..1..1..1..0....0..1..1..1
..1..0..1..1....1..1..0..1
CROSSREFS
Sequence in context: A250188 A177126 A300150 * A231880 A102089 A250797
KEYWORD
nonn
AUTHOR
R. H. Hardin Mar 12 2011
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 September 11 13:40 EDT 2024. Contains 375836 sequences. (Running on oeis4.)