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, 52, 10900, 43366459, 746823293346, 37155328943771767, 4226534204353128532380, 947741983969338430602294081, 378161752496622695975714927056844, 249107761813131722624691729833262083766, 255811781476365074058962776043470702114960079

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