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

Author

R. H. Hardin Sep 01 2012

Keywords

• nonn

Comments

Row 4 of A216084

Examples

			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
		

Links

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