id:A038388 - OEIS Search Results

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Let f(n) be the smallest number such that the arithmetic mean (A) and geometric mean (G) of n and f(n) are both integers; sequence gives G values.

+0
3

1, 2, 3, 4, 5, 6, 7, 4, 3, 10, 11, 12, 13, 14, 15, 8, 17, 6, 19, 20, 21, 22, 23, 12, 5, 26, 9, 28, 29, 30, 31, 8, 33, 34, 35, 12, 37, 38, 39, 20, 41, 42, 43, 44, 15, 46, 47, 24, 7, 10, 51, 52, 53, 18, 55, 28, 57, 58, 59, 60, 61, 62, 21, 16, 65, 66, 67, 68, 69, 70, 71, 12, 73, 74, 15 (list; graph; listen)

	OFFSET	`1,2`
	FORMULA	`Multiplicative with a(p^e) = p^((e+1)/2) if e is odd, 2^(e/2+1) if p=2 and e is even, p^(e/2) if p>2 and e is even. - Vladeta Jovovic (vladeta(AT)eunet.rs), May 15 2003`
	CROSSREFS	`Cf. A038387, A038389.` `Cf. A053626, A053627.` `Sequence in context: A066323 A115871 A138221 this_sequence A083501 A007922 A007948` `Adjacent sequences: A038385 A038386 A038387 this_sequence A038389 A038390 A038391`
	KEYWORD	`nonn,mult`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`
	EXTENSIONS	`More terms from Vladeta Jovovic (vladeta(AT)eunet.rs), May 15 2003`

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

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