id:A114068 - OEIS Search Results

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sigma(n) + phi(n) is a fourth power.

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110, 125, 609, 2047, 4895, 9819, 10149, 10367, 18974, 31269, 37032, 40662, 42032, 44238, 44835, 48125, 51459, 51535, 52487, 77425, 90090, 116633, 129846, 137865, 145299, 146566, 151438, 159565, 161614, 162334, 207710, 307327, 357116 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`sigma(110) + phi(110) = 256 = 4^4.`
	CROSSREFS	`Adjacent sequences: A114065 A114066 A114067 this_sequence A114069 A114070 A114071` `Sequence in context: A110735 A101317 A059469 this_sequence A073494 A073488 A039447`
	KEYWORD	`nonn`
	AUTHOR	`Giovanni Resta (g.resta(AT)iit.cnr.it), Feb 13 2006`

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.

AT&T Labs Research