A216089 Number of horizontal and antidiagonal neighbor colorings of the odd squares of a 7Xn array with new integer colors introduced in row major order

5, 409, 21147, 18378580, 5116799368, 20358402201792, 14216413305846436, 152834688133255075552, 204451723997895101749260

Offset

1,1

Comments

Row 7 of A216084

Links

Table of n, a(n) for n=1..9.

Example

Some solutions for n=4
..x..0..x..1....x..0..x..1....x..0..x..1....x..0..x..1....x..0..x..1
..1..x..0..x....1..x..0..x....1..x..0..x....1..x..0..x....1..x..0..x
..x..1..x..2....x..1..x..2....x..1..x..2....x..1..x..2....x..2..x..0
..3..x..4..x....2..x..1..x....3..x..4..x....3..x..0..x....0..x..3..x
..x..2..x..1....x..3..x..4....x..5..x..6....x..1..x..4....x..1..x..0
..3..x..0..x....5..x..0..x....0..x..2..x....5..x..1..x....2..x..4..x
..x..2..x..5....x..1..x..0....x..0..x..6....x..4..x..3....x..3..x..1

Crossrefs

Sequence in context: A075769 A046274 A221700 * A201887 A365370 A301309

Adjacent sequences: A216086 A216087 A216088 * A216090 A216091 A216092

Keyword

nonn

Author

R. H. Hardin Sep 01 2012

Status

approved