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A212830
Number of 0..n arrays of length n+1 with no adjacent pair equal to its immediately preceding adjacent pair, and new values introduced in 0..n order
1
2, 5, 13, 44, 168, 717, 3360, 17092, 93538, 546873, 3396379, 22300885, 154193327, 1118804486, 8493592723, 67288261914, 554996479921, 4756036642107, 42266543239132, 388879705390976, 3698606881082199, 36312877059583874
OFFSET
1,1
COMMENTS
Subdiagonal 1 of A212829
LINKS
EXAMPLE
Some solutions for n
..0....0....0....0....0....0....0....0....0....0....0....0....0....0....0....0
..1....1....1....1....1....1....1....1....1....1....1....1....1....0....1....1
..0....1....1....1....2....2....2....0....2....2....2....0....2....1....1....2
..0....2....2....2....0....3....1....2....1....3....0....2....0....1....2....3
..2....1....3....0....0....4....3....2....1....4....2....1....0....1....0....1
..3....1....3....1....3....4....3....2....2....2....3....1....2....2....3....4
..4....2....4....0....1....4....4....1....3....2....4....0....3....2....0....5
..0....2....5....0....1....0....5....1....3....0....5....0....3....0....0....1
CROSSREFS
Sequence in context: A212826 A212827 A212828 * A000719 A149875 A221546
KEYWORD
nonn
AUTHOR
R. H. Hardin May 28 2012
STATUS
approved