A216086 Number of horizontal and antidiagonal neighbor colorings of the odd squares of a 4Xn array with new integer colors introduced in row major order

2, 7, 52, 602, 12840, 322768, 12297870, 514264344, 29562890980, 1804957901332, 142953068558998, 11807624690799832, 1216988850964527370, 129339015912912689012, 16679506383419809650408, 2201178485290778203106968

Offset

1,1

Comments

Row 4 of A216084

Links

R. H. Hardin, Table of n, a(n) for n = 1..19

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..2..x....1..x..2..x....2..x..3..x....2..x..0..x....2..x..0..x
..x..0..x..2....x..3..x..4....x..0..x..4....x..3..x..4....x..1..x..2
..1..x..0..x....5..x..6..x....2..x..0..x....5..x..6..x....3..x..0..x

Crossrefs

Sequence in context: A279198 A220092 A138737 * A210856 A046662 A237195

Adjacent sequences: A216083 A216084 A216085 * A216087 A216088 A216089

Keyword

nonn

Author

R. H. Hardin Sep 01 2012

Status

approved