A054024 - OEIS

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A054024

Sum of divisors of n reduced modulo n.

0, 1, 1, 3, 1, 0, 1, 7, 4, 8, 1, 4, 1, 10, 9, 15, 1, 3, 1, 2, 11, 14, 1, 12, 6, 16, 13, 0, 1, 12, 1, 31, 15, 20, 13, 19, 1, 22, 17, 10, 1, 12, 1, 40, 33, 26, 1, 28, 8, 43, 21, 46, 1, 12, 17, 8, 23, 32, 1, 48, 1, 34, 41, 63, 19, 12, 1, 58, 27, 4, 1, 51, 1, 40, 49, 64, 19, 12, 1, 26, 40 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,4`
	LINKS	`T. D. Noe, Table of n, a(n) for n=1..1000` `Walter Nissen, Abundancy : Some Resources`
	FORMULA	`a(n) = A000203(n) mod n`
	MAPLE	`with(numtheory): seq(sigma(i) mod i, i=1..100);`
	CROSSREFS	`Cf. A000203.` `Sequence in context: A106800 A055807 A205099 * A144644 A151509 A151511` `Adjacent sequences: A054021 A054022 A054023 * A054025 A054026 A054027`
	KEYWORD	`nonn`
	AUTHOR	`Asher Auel (asher.auel(AT)reed.edu) Jan 19, 2000`

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Last modified February 17 17:51 EST 2012. Contains 206061 sequences.