id:A135157 - OEIS Search Results

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Number of primitive (no repeated characters) and irreducible (not the concatenation of generatable strings) strings obtained from abc by iterated repetition of substrings in place.

+0
2

1, 0, 2, 0, 3, 1, 4, 0, 5, 2, 6, 0, 7, 3, 8, 0, 9, 6, 10, 0, 11, 12, 12, 4, 13, 24, 14, 23, 15, 54, 16, 91, 17, 149, 18, 326, 19, 484, 20, 1144, 21, 1741, 22, 4015, 23, 6589, 24, 14296, 25, 25299, 26, 52077, 27, 97264, 28, 193781, 29, 373996, 30, 733076 (list; graph; listen)

	OFFSET	`0,3`
	LINKS	`Index entries for doubling substrings`
	CROSSREFS	`Cf. A135473, A135156.` `Sequence in context: A029239 A029219 A110514 this_sequence A135156 A063277 A029178` `Adjacent sequences: A135154 A135155 A135156 this_sequence A135158 A135159 A135160`
	KEYWORD	`nonn`
	AUTHOR	`David Applegate and njas, Feb 15 2008`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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