id:A143480 - OEIS Search Results

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a(1)=1. a(n) = the smallest positive multiple of n such that phi(a(n)) > phi(a(n-1)), where phi(m) is the number of positive integers <= m and coprime to m.

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1, 4, 9, 16, 25, 72, 49, 104, 81, 160, 121, 348, 143, 322, 285, 352, 221, 648, 323, 800, 567, 814, 437, 1272, 575, 1066, 729, 1204, 667, 2370, 713, 1376, 1221, 1598, 1225, 2592, 1073, 2242, 1833, 2840, 1271, 4326, 1333, 2816, 2565, 2806, 1457, 4272, 1813 (list; graph; listen)

	OFFSET	`1,2`
	LINKS	`Leroy Quet, Home Page (listed in lieu of email address)`
	CROSSREFS	`Cf. A143481.` `Sequence in context: A115648 A082522 A133900 this_sequence A050461 A022334 A073171` `Adjacent sequences: A143477 A143478 A143479 this_sequence A143481 A143482 A143483`
	KEYWORD	`nonn`
	AUTHOR	`Leroy Quet Aug 19 2008`
	EXTENSIONS	`Extended by Ray Chandler (rayjchandler(AT)sbcglobal.net), Nov 09 2008`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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