id:A158620 - OEIS Search Results

Search: id:A158620

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Partial products of A068601.

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7, 182, 11466, 1421784, 305683560, 104543777520, 53421870312720, 38891121587660160, 38852230466072499840, 51673466519876424787200, 89240076679826585607494400, 195971208388899181994057702400 (list; graph; listen)

	OFFSET	`2,1`
	COMMENT	`A158621(n) = PRODUCT[k=2..n](k^3+1). A158622(n) is the numerator of the reduced fraction A158620(n)/A158621(n). A158623(n) is the denominator of the reduced fraction A158620(n)/A158621(n).`
	FORMULA	`PRODUCT[k=2..n](k^3-1) = PRODUCT[k=2..n]A068601(k).`
	EXAMPLE	`a(2) = 2^3-1 = 7. a(3) = (2^3-1)(3^3-1) = 7 26 = 182. a(4) = (2^3-1)(3^3-1)(4^3-1) = 7 * 26 * 63 = 11466.`
	CROSSREFS	`Cf. A000217, A005448, A016921, A068601, A158621-A158624.` `Sequence in context: A080484 A068339 A059382 this_sequence A152436 A012843 A012798` `Adjacent sequences: A158617 A158618 A158619 this_sequence A158621 A158622 A158623`
	KEYWORD	`easy,nonn`
	AUTHOR	`Jonathan Vos Post (jvospost3(AT)gmail.com), Mar 23 2009`

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Last modified December 9 18:50 EST 2009. Contains 170568 sequences.

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