id:A066961 - OEIS Search Results

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Sigma(n) divides sigma(sigma(n)).

+0
2

1, 5, 12, 54, 56, 87, 95, 276, 308, 427, 429, 446, 455, 501, 581, 611, 9120, 9180, 9504, 9720, 9960, 10296, 10620, 10740, 10824, 11070, 11310, 11480, 11484, 11556, 11628, 11748, 11934, 11960, 12024, 12036, 12072, 12084, 12376, 12460, 12510, 12570 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Is this sequence is finite?`
	CROSSREFS	`Sequence in context: A074024 A054661 A062978 this_sequence A131549 A111904 A015784` `Adjacent sequences: A066958 A066959 A066960 this_sequence A066962 A066963 A066964`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Jan 26 2002`
	EXTENSIONS	`More terms from Lior Manor (lior.manor(AT)gmail.com) Feb 06 2002`

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Last modified December 2 11:54 EST 2009. Contains 167921 sequences.

AT&T Labs Research