A242467 Number of length n+2 0..n arrays with no three equal elements in a row and new values 0..n introduced in 0..n order.

3, 11, 40, 158, 684, 3232, 16533, 90862, 533013, 3319374, 21844874, 151329961, 1099822975, 8361244270, 66320787389, 547602710173, 4697109624463, 41777867546600, 384671271459042, 3661037447467530, 35965775221739498

Offset

1,1

Comments

Diagonal of A242472.

Links

R. H. Hardin, Table of n, a(n) for n = 1..163

Example

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

Crossrefs

Cf. A242472.

Sequence in context: A346317 A119375 A149063 * A149064 A149065 A131526

Adjacent sequences: A242464 A242465 A242466 * A242468 A242469 A242470

Keyword

nonn

Author

R. H. Hardin, May 15 2014

Status

approved