id:A115908 - OEIS Search Results

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Numbers n such that phi(n) plus the n-th prime is a triangular number.

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1, 5, 6, 15, 23, 141, 150, 258, 317, 340, 359, 378, 471, 503, 768, 1363, 2175, 2516, 3285, 3342, 3815, 3905, 4385, 4748, 5385, 5976, 6026, 6900, 7048, 7151, 7411, 7698, 8251, 8310, 8828, 10182, 10461, 12022, 12508, 13722, 13840, 15456, 16582 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`phi(503)+p(503)=4095=T(90).`
	CROSSREFS	`Cf. A115882, A115907.` `Sequence in context: A064949 A121847 A030533 this_sequence A091020 A019070 A019071` `Adjacent sequences: A115905 A115906 A115907 this_sequence A115909 A115910 A115911`
	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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