A212833 Number of 0..n arrays of length n+1 with 0 never adjacent to n.

2, 17, 178, 2309, 35954, 654797, 13667858, 321839625, 8441614754, 244108628489, 7716226532642, 264711412437133, 9795540525116306, 388938430069794373, 16494335589910579186, 744110964577292267537, 35582626582915655239234

Offset: 1

Author

R. H. Hardin May 28 2012

Keywords

• nonn

Comments

Diagonal of A212835

Examples

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

Links

• R. H. Hardin, Table of n, a(n) for n = 1..210