The OEIS is supported by the many generous donors to the OEIS Foundation.

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A190537 Number of (n+2)X(n+2) symmetric binary matrices without the pattern 0 1 1 diagonally, vertically or horizontally 1
 39, 276, 2462, 30347, 497319, 11215564, 345643238, 14729798587, 868126086355, 71051142699591, 8082717906091557, 1279982834102896086, 282345340720841681874, 86807291886729731363231 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 LINKS R. H. Hardin, Table of n, a(n) for n = 1..17 EXAMPLE Some solutions for 4X4 ..1..1..1..0....0..0..0..1....1..1..0..0....0..1..0..1....1..0..0..1 ..1..0..1..0....0..1..0..1....1..1..1..0....1..1..1..1....0..0..0..1 ..1..1..0..0....0..0..0..0....0..1..0..1....0..1..0..0....0..0..0..0 ..0..0..0..0....1..1..0..0....0..0..1..0....1..1..0..0....1..1..0..0 CROSSREFS Sequence in context: A229639 A070146 A327344 * A187095 A232874 A061169 Adjacent sequences: A190534 A190535 A190536 * A190538 A190539 A190540 KEYWORD nonn AUTHOR R. H. Hardin May 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.

Last modified April 22 09:25 EDT 2024. Contains 371894 sequences. (Running on oeis4.)