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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A205512 Number of (n+1)X(n+1) 0..2 arrays with the number of clockwise edge increases in every 2X2 subblock differing from each horizontal or vertical neighbor 0
 81, 2412, 205803, 44160240, 25618992453, 37886453633808, 153727495029223899, 1571194548319712891100 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Diagonal of A205520 LINKS Table of n, a(n) for n=1..8. EXAMPLE Some solutions for n=4 ..1..2..0..0..1....2..0..1..2..0....1..1..1..0..0....0..1..0..0..2 ..2..2..1..1..0....2..2..1..2..1....1..0..2..0..0....1..2..0..0..1 ..1..0..0..2..0....1..0..1..0..1....2..1..2..1..0....2..2..1..1..2 ..0..0..0..2..1....2..2..0..0..2....1..1..0..0..2....1..0..0..2..2 ..2..1..1..0..0....1..0..0..0..1....0..2..0..0..2....0..0..0..1..0 CROSSREFS Sequence in context: A128832 A085877 A123219 * A297606 A236729 A236147 Adjacent sequences: A205509 A205510 A205511 * A205513 A205514 A205515 KEYWORD nonn AUTHOR R. H. Hardin Jan 28 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 | Recents
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified September 11 05:04 EDT 2024. Contains 375814 sequences. (Running on oeis4.)