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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 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Subdiagonal 1 of A212829

LINKS

R. H. Hardin, Table of n, a(n) for n = 1..60

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

Adjacent sequences:  A212827 A212828 A212829 * A212831 A212832 A212833

KEYWORD

nonn

AUTHOR

R. H. Hardin May 28 2012

STATUS

approved

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Last modified November 22 18:55 EST 2019. Contains 329410 sequences. (Running on oeis4.)