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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. +0
3
123, 12123, 12323, 123123, 1212123, 1212323, 1232323 (list; graph; listen)
OFFSET

1,1

COMMENT

The list contains A135017(n) strings of length n.

The subset of strings in A135475 that contain no repeated symbol.

LINKS

Index entries for doubling substrings

CROSSREFS

Adjacent sequences: A135476 A135477 A135478 this_sequence A135480 A135481 A135482

Sequence in context: A115983 A068239 A098683 this_sequence A095761 A121917 A049670

KEYWORD

nonn,easy,more

AUTHOR

njas, Feb 22 2008

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Last modified October 6 16:13 EDT 2008. Contains 144667 sequences.


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