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A215334 Smooth Lyndon words with 7 colors. 1
1, 7, 6, 17, 42, 119, 305, 829, 2196, 5907, 15863, 42842, 115845, 314368, 854647, 2329087, 6358855, 17393327, 47652117, 130752969, 359270784, 988458115, 2722792878 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,2

COMMENTS

We call a Lyndon word (x[1],x[2],...,x[n]) smooth if abs(x[k]-x[k-1]) <= 1 for 2<=k<=n.

LINKS

Table of n, a(n) for n=0..22.

EXAMPLE

(See A215333).

CROSSREFS

Cf. A215328 (smooth Lyndon words, 3 colors), A215327 (smooth necklaces, 3 colors).

Sequence in context: A078323 A099255 A198460 * A298377 A299244 A249114

Adjacent sequences:  A215331 A215332 A215333 * A215335 A215336 A215337

KEYWORD

nonn,more

AUTHOR

Joerg Arndt, Aug 08 2012

EXTENSIONS

More terms from Joerg Arndt, Jun 17 2019

STATUS

approved

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Last modified November 21 12:20 EST 2019. Contains 329370 sequences. (Running on oeis4.)