id:A063972 - OEIS Search Results

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a(n) is the smallest m such that usigma(m) = n (or 0 if no such m).

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1, 0, 2, 3, 4, 5, 0, 7, 8, 9, 0, 6, 0, 13, 0, 0, 16, 10, 0, 12, 0, 0, 0, 14, 0, 25, 0, 27, 0, 18, 0, 21, 32, 0, 0, 22, 0, 37, 0, 28, 0, 26, 0, 43, 0, 0, 0, 33, 0, 36, 0, 0, 0, 34, 0, 39, 0, 0, 0, 38, 0, 61, 0, 0, 64, 0, 0, 48, 0, 52, 0, 30, 0, 73, 0, 0, 0, 50, 0, 57, 0, 81, 0, 54, 0, 0, 0, 0, 0 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`usigma(m) is the sum of unitary divisors of m, A034448.`
	EXAMPLE	`a(12)=6 because the unitary divisors of 6 are 1,2,3,6; they sum to 12.`
	CROSSREFS	`Cf. A034444, A034448, A051444, A057637, A063973.` `Sequence in context: A049265 A010875 A095874 this_sequence A063973 A126441 A004181` `Adjacent sequences: A063969 A063970 A063971 this_sequence A063973 A063974 A063975`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Sep 05 2001`
	EXTENSIONS	`Edited by Don Reble (djr(AT)nk.ca), May 14 2006`

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Last modified December 20 00:58 EST 2009. Contains 171054 sequences.

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