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

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A208100 Number of 5 X n nonnegative integer arrays with new values 0 upwards introduced in row major order and no element equal to any horizontal, diagonal or antidiagonal neighbor (colorings ignoring permutations of colors). 1
 1, 52, 10900, 43366459, 746823293346, 37155328943771767, 4226534204353128532380, 947741983969338430602294081, 378161752496622695975714927056844, 249107761813131722624691729833262083766, 255811781476365074058962776043470702114960079 (list; graph; refs; listen; history; text; internal format)
 OFFSET 0,2 LINKS Andrew Howroyd, Table of n, a(n) for n = 0..100 EXAMPLE Some solutions for n=4: ..0..1..0..1....0..1..0..1....0..1..0..1....0..1..0..1....0..1..0..1 ..0..1..2..1....0..2..0..1....0..1..0..1....0..1..0..1....0..1..0..1 ..0..1..0..1....0..1..0..1....0..1..0..1....0..1..0..1....2..1..0..3 ..0..1..0..1....0..2..0..1....0..1..0..1....0..1..2..1....0..1..0..1 ..3..1..0..1....0..1..3..1....0..1..0..1....0..1..0..1....0..3..0..1 CROSSREFS Row 5 of A208096. Sequence in context: A209741 A209462 A209524 * A232521 A346934 A200806 Adjacent sequences:  A208097 A208098 A208099 * A208101 A208102 A208103 KEYWORD nonn AUTHOR R. H. Hardin, Feb 23 2012 EXTENSIONS a(0)=1 prepended and terms a(6) and beyond from Andrew Howroyd, May 18 2020 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 September 25 23:58 EDT 2021. Contains 347664 sequences. (Running on oeis4.)