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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.
1
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
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
KEYWORD
nonn
AUTHOR
R. H. Hardin, May 15 2014
STATUS
approved