id:A116031 - OEIS Search Results

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sigma(n)-phi(n) and sigma(n)+phi(n) are two palindromes greater than 2.

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4, 388, 403, 10010, 11481, 12215, 41242, 42173, 44243, 223261, 223487, 403303, 2302031, 3288877 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`sigma(3288877)-phi(3288877) = 44444 and` `sigma(3288877)+phi(3288877)=6577756.`
	CROSSREFS	`Cf. A115897, A116030.` `Sequence in context: A038015 A003753 A006237 this_sequence A115049 A158111 A036771` `Adjacent sequences: A116028 A116029 A116030 this_sequence A116032 A116033 A116034`
	KEYWORD	`nonn,base`
	AUTHOR	`Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 13 2006`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.