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

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A253486 Number of (5+1)X(n+1) 0..2 arrays with every 2X2 subblock ne-sw antidiagonal difference unequal to its neighbors horizontally and nw+se diagonal sum unequal to its neighbors vertically 1
 187704, 13347930, 1029772234, 78704951512, 6038749847806, 462971719837062, 35518545028273216, 2724284315820353036, 208979165632398419724, 16029897424341313070302, 1229615670749498056544226 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Row 5 of A253482 LINKS R. H. Hardin, Table of n, a(n) for n = 1..103 EXAMPLE Some solutions for n=1 ..1..1....1..0....0..1....1..0....0..1....1..1....1..0....0..1....1..0....1..1 ..1..0....0..2....1..1....0..1....0..1....1..2....0..1....1..0....2..0....0..1 ..0..1....0..1....0..1....1..1....2..0....2..0....0..0....2..2....0..0....0..1 ..2..1....0..0....2..1....0..1....2..0....0..2....0..2....0..2....2..0....1..0 ..0..2....2..2....0..2....0..0....0..1....2..0....0..1....1..1....1..0....1..2 ..2..1....2..2....2..1....2..1....1..2....0..2....1..0....2..2....1..0....0..1 CROSSREFS Sequence in context: A151422 A250541 A251798 * A253481 A186137 A233715 Adjacent sequences:  A253483 A253484 A253485 * A253487 A253488 A253489 KEYWORD nonn AUTHOR R. H. Hardin, Jan 02 2015 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.

Last modified December 4 22:42 EST 2021. Contains 349526 sequences. (Running on oeis4.)