A123400 - OEIS

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A123400

Infinite string related to Ehrlich's swap method for generating permutations.

1, 2, 1, 2, 1, 3, 2, 1, 2, 1, 2, 3, 1, 2, 1, 2, 1, 3, 2, 1, 2, 1, 2, 4, 3, 1, 3, 1, 3, 2, 1, 3, 1, 3, 1, 2, 3, 1, 3, 1, 3, 2, 1, 3, 1, 3, 1, 4, 2, 3, 2, 3, 2, 1, 3, 2, 3, 2, 3, 1, 2, 3, 2, 3, 2, 1, 3, 2, 3, 2, 3, 4, 1, 2, 1, 2, 1, 3, 2, 1, 2, 1, 2, 3, 1, 2, 1, 2, 1, 3, 2, 1, 2, 1, 2, 4, 3, 1, 3, 1, 3, 2, 1, 3, 1 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	REFERENCES	`D. E. Knuth, TAOCP, Section 7.2.1.2.`
	CROSSREFS	`Cf. A159880 (first element in successive permutations).` `Sequence in context: A154819 A104145 A123675 * A196059 A023116 A084822` `Adjacent sequences: A123397 A123398 A123399 * A123401 A123402 A123403`
	KEYWORD	`nonn`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com), Oct 15 2006`
	EXTENSIONS	`More terms from Joerg Arndt (arndt(AT)jjj.de), Apr 25 2009`

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Last modified February 16 02:30 EST 2012. Contains 205860 sequences.