id:A152864 - OEIS Search Results

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Deficiency of n, plus the number of proper divisors of n: a(n) = 2n - sigma(n) + d(n) - 1.

+0
4

1, 2, 3, 3, 5, 3, 7, 4, 7, 5, 11, 1, 13, 7, 9, 5, 17, 2, 19, 3, 13, 11, 23, -5, 21, 13, 17, 5, 29, -5, 31, 6, 21, 17, 25, -11, 37, 19, 25, -3, 41, -5, 43, 9, 17, 23, 47, -19, 43, 12, 33, 11, 53, -5, 41, -1, 37, 29, 59, -37, 61, 31 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`a(n) = A005843(n)-A000203(n)+A000005(n)-1 = A033879(n)+A032741(n).`
	CROSSREFS	`Cf. A000005, A000203, A005843, A032741, A033879, A152770, A152771, A152772.` `Sequence in context: A117531 A105555 A066858 this_sequence A152984 A064921 A064917` `Adjacent sequences: A152861 A152862 A152863 this_sequence A152865 A152866 A152867`
	KEYWORD	`easy,sign`
	AUTHOR	`Omar E. Pol (info(AT)polprimos.com), Dec 14 2008`

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Last modified November 23 17:09 EST 2009. Contains 167438 sequences.

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