id:A048747 - OEIS Search Results

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Factor n, divide sum of divisors by number of divisors; append n to sequence if quotient is integral and not previously seen.

+0
4

6, 14, 20, 21, 22, 27, 33, 38, 39, 45, 46, 49, 57, 62, 65, 85, 86, 87, 91, 93, 94, 99, 111, 116, 118, 123, 125, 129, 133, 134, 141, 142, 150, 158, 164, 166, 169, 183, 185, 188, 201, 206, 207, 213, 214, 215, 217, 219, 236, 237, 249, 254, 259, 261, 262, 267, 278 (list; graph; listen)

	OFFSET	`6,1`
	EXAMPLE	`a(3)=20; for n=20 the sum of divisors is 42; number of divisors is 6; 42/6=7. The quotient 7 is the mean divisor, and this is the first time that 7 has occurred.`
	CROSSREFS	`Gives first occurrence of terms in A023883. Cf. A048748.` `Sequence in context: A053474 A072204 A037177 this_sequence A101567 A123267 A064708` `Adjacent sequences: A048744 A048745 A048746 this_sequence A048748 A048749 A048750`
	KEYWORD	`easy,nonn`
	AUTHOR	`Enoch Haga (Enokh(AT)comcast.net)`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

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