id:A015863 - OEIS Search Results

Search: id:A015863

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Numbers n such that sigma(n) = sigma(n + 4).

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51, 66, 115, 220, 319, 1003, 2585, 4024, 4183, 4195, 5720, 5826, 5959, 8004, 8374, 11659, 12367, 12561, 13581, 14338, 15365, 16116, 17840, 18718, 20541, 25130, 29393, 30170, 32665, 36516, 39913, 40660, 42423, 42922, 47841, 49762 (list; graph; listen)

	OFFSET	`1,1`
	REFERENCES	`J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 51, p. 19, Ellipses, Paris 2008.`
	CROSSREFS	`Sequence in context: A050701 A034819 A118147 this_sequence A113285 A050698 A039474` `Adjacent sequences: A015860 A015861 A015862 this_sequence A015864 A015865 A015866`
	KEYWORD	`nonn`
	AUTHOR	`Robert G. Wilson v (rgwv(AT)rgwv.com)`

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Last modified December 20 16:54 EST 2009. Contains 171081 sequences.

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