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A135479 Sorted list of primitive strings that can be obtained by starting with 123 and repeatedly doubling any substring in place. 3
123, 12123, 12323, 123123, 1212123, 1212323, 1232323, 12123123, 12312123, 12312323, 12313123, 12323123, 121212123, 121212323, 121232123, 121232323, 123123123, 123212323, 123232323, 1212123123, 1212312123, 1212312323, 1212313123, 1212323123, 1231212123 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
The list contains A135017(n) strings of length n.
The subset of strings in A135475 that contain no repeated symbol.
LINKS
CROSSREFS
Sequence in context: A068239 A098683 A324435 * A095761 A121917 A049670
KEYWORD
nonn,easy
AUTHOR
N. J. A. Sloane, Feb 22 2008
STATUS
approved

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Last modified March 28 09:04 EDT 2024. Contains 371240 sequences. (Running on oeis4.)