A216026 Number of horizontal, vertical and diagonal neighbor colorings of the odd squares of an nX3 array with new integer colors introduced in row major order.

1, 2, 4, 29, 97, 1534, 7050, 188835, 1084180, 42756208, 291120551, 15590248868, 121920095674, 8414029179365, 73953763887277, 6340176007793060, 61657373569634586, 6390402969619162909, 67948766672072844798

Offset: 1

Author

R. H. Hardin Aug 30 2012

Keywords

• nonn

Comments

Column 3 of A216031

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..41