id:A071260 - OEIS Search Results

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Integer part of the geometric mean of the n-th prime prime(n) and the n-th composite number C(n).

+0
2

2, 4, 6, 7, 10, 12, 15, 16, 19, 22, 24, 27, 30, 32, 34, 37, 39, 41, 44, 47, 49, 51, 53, 56, 60, 62, 64, 67, 69, 71, 76, 79, 81, 83, 87, 88, 92, 94, 96, 99, 101, 104, 108, 110, 112, 113, 118, 123, 125, 126, 129, 132, 134, 138, 140, 143, 146, 148, 150, 153, 155, 158 (list; graph; listen)

	OFFSET	`0,1`
	FORMULA	`Floor [ {prime(n)* C(n)}^(1/2)]`
	EXAMPLE	`a(7) =floor {prime(7)C(7)}^(1/2) = (1714)^1/2 = 15.`
	CROSSREFS	`Cf. A071259.` `Adjacent sequences: A071257 A071258 A071259 this_sequence A071261 A071262 A071263` `Sequence in context: A026230 A026144 A047510 this_sequence A026407 A003035 A094453`
	KEYWORD	`nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), May 30 2002`
	EXTENSIONS	`More terms from Hans Havermann (pxp(AT)rogers.com), Sep 23 2002`

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.

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