id:A115910 - OEIS Search Results

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Numbers n such that phi(n) times n is a triangular number.

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3

1, 3, 15, 84, 217, 255, 1710, 2967, 5363, 11242, 24066, 27370, 29697, 29953, 60977, 65535, 69324, 103257, 159761, 209305, 228333, 446516, 598559, 615410, 691410, 1231305, 1238358, 1365175, 1467732, 1841154, 1966220, 2081070, 2562370 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`phi(24066)*24066=164611440=T(18144).`
	CROSSREFS	`Cf. A115905, A115909.` `Sequence in context: A026019 A118356 A074552 this_sequence A106569 A026032 A005809` `Adjacent sequences: A115907 A115908 A115909 this_sequence A115911 A115912 A115913`
	KEYWORD	`nonn`
	AUTHOR	`Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 06 2006`

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Last modified November 18 20:14 EST 2008. Contains 147244 sequences.

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