id:A015705 - OEIS Search Results

Search: id:A015705

Displaying 1-1 of 1 results found.

page 1

Geometric mean of phi(n) and sigma(n) is an integer, n odd.

+0
1

1, 51, 105, 405, 477, 595, 679, 1023, 1455, 1463, 1485, 1715, 1731, 2651, 2945, 3135, 3567, 4381, 5797, 5859, 8245, 8255, 8721, 9639, 9809, 10127, 10153, 10179, 10295, 11935, 12369, 17765, 17955, 19125, 19875, 20195, 20213, 20273 (list; graph; listen)

	OFFSET	`0,2`
	REFERENCES	`R. K. Guy, Divisors and desires, Amer. Math. Monthly, 104 (1997), 359-360.`
	CROSSREFS	`Cf. A011257.` `Sequence in context: A044140 A044521 A160847 this_sequence A044238 A044619 A031894` `Adjacent sequences: A015702 A015703 A015704 this_sequence A015706 A015707 A015708`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com)`

page 1

Search completed in 0.002 seconds

Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

AT&T Labs Research