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, 2, 5, 102, 1250, 159712, 4851360, 1590366402, 83943993818, 52903063680088, 4173873098644366, 4356236728241936100, 472112409203884877570, 744172525994204410810964, 104912731359552572271902248, 234520384912168611980200390370, 41397926646267697867589499650186

Offset

0,2

Links

Andrew Howroyd, Table of n, a(n) for n = 0..50

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

Adjacent sequences: A215842 A215843 A215844 * A215846 A215847 A215848

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