id:A070286 - OEIS Search Results

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Numbers n such that the equation sigma(sigma(x))=n has solutions.

+0
3

1, 4, 7, 8, 12, 14, 15, 24, 28, 32, 39, 42, 56, 60, 63, 72, 80, 84, 90, 91, 96, 104, 112, 114, 120, 124, 126, 128, 133, 160, 168, 171, 186, 195, 210, 216, 224, 234, 240, 248, 252, 255, 256, 260, 280, 288, 294, 300, 308, 312, 336, 360, 363, 372, 378, 384, 392 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`Complement of A162923. [From Jaroslav Krizek (jaroslav.krizek(AT)atlas.cz), Jul 19 2009]`
	CROSSREFS	`Sequence in context: A061932 A060833 A162967 this_sequence A047536 A093494 A051027` `Adjacent sequences: A070283 A070284 A070285 this_sequence A070287 A070288 A070289`
	KEYWORD	`easy,nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), May 10 2002`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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