A252173 Number of length n+2 0..4 arrays with the sum of the maximum minus the minimum of adjacent triples multiplied by some arrangement of +-1 equal to zero.

5, 285, 687, 6361, 30315, 179225, 907249, 4728833, 23847033, 120644221, 605522767, 3038459385, 15215512685, 76167143089, 381063555999, 1906111738921, 9532798497759, 47671420448717, 238379347788679, 1191968945583273

Offset: 1

Author

R. H. Hardin, Dec 15 2014

Keywords

• nonn

Comments

Column 4 of A252177

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..84