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A215845 Number of horizontal, vertical, diagonal and antidiagonal neighbor colorings of the even squares of an n X 5 array with new integer colors introduced in row major order. 1
1, 2, 5, 102, 1250, 159712, 4851360, 1590366402, 83943993818, 52903063680088, 4173873098644366, 4356236728241936100, 472112409203884877570, 744172525994204410810964, 104912731359552572271902248, 234520384912168611980200390370, 41397926646267697867589499650186 (list; graph; refs; listen; history; text; internal format)
OFFSET
0,2
LINKS
EXAMPLE
Some solutions for n=3:
..0..x..1..x..2....0..x..1..x..2....0..x..1..x..2....0..x..1..x..2
..x..3..x..4..x....x..3..x..4..x....x..3..x..0..x....x..3..x..4..x
..5..x..2..x..1....5..x..0..x..3....4..x..5..x..3....5..x..6..x..0
CROSSREFS
Column 5 of A215847.
Sequence in context: A132482 A208209 A276267 * A276110 A136106 A122696
KEYWORD
nonn
AUTHOR
R. H. Hardin, Aug 24 2012
EXTENSIONS
a(0)=1 prepended and terms a(13) and beyond from Andrew Howroyd, Jun 25 2017
STATUS
approved

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Last modified April 25 07:07 EDT 2024. Contains 371964 sequences. (Running on oeis4.)