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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A183579 Half the number of nX4 0..3 arrays with each element equal to either the maximum or the minimum of its horizontal and vertical neighbors 1
 8, 407, 9667, 240358, 5987795, 149355515, 3724940988, 92915045150, 2317648165893, 57811518197886, 1442053664104187, 35970710709296927, 897256757776720016, 22381259751777880373, 558280348730102033060 (list; graph; refs; listen; history; text; internal format)
 OFFSET 1,1 COMMENTS Column 4 of A183584 LINKS R. H. Hardin, Table of n, a(n) for n = 1..200 EXAMPLE Some solutions with a(1,1)<=1 for 3X4 ..0..0..2..1....1..1..1..1....1..1..1..1....1..3..1..1....0..0..1..1 ..1..0..2..1....1..3..1..1....0..0..2..2....1..3..3..1....1..1..1..1 ..1..0..2..2....1..3..3..1....0..0..0..2....2..2..3..3....1..0..0..1 CROSSREFS Sequence in context: A220550 A191874 A323575 * A015091 A008274 A188422 Adjacent sequences: A183576 A183577 A183578 * A183580 A183581 A183582 KEYWORD nonn AUTHOR R. H. Hardin Jan 05 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 March 22 14:53 EDT 2023. Contains 361430 sequences. (Running on oeis4.)