id:A158621 - OEIS Search Results

Search: id:A158621

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Partial products of A001093.

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9, 252, 16380, 2063880, 447861960, 154064514240, 79035095805120, 57695619937737600, 57753315557675337600, 76927416322823549683200, 133007502822161917402252800, 292350491203111894450151654400 (list; graph; listen)

	OFFSET	`2,1`
	COMMENT	`A158620(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]A001093(k).`
	EXAMPLE	`a(2) = 2^3+1 = 9. a(3) = (2^3+1)(3^3+1) = 9 28 = 252. a(4) = (2^3+1)(3^3+1)(4^3+1) = 9 * 28 * 65 = 16380.`
	CROSSREFS	`Cf. A001093, A016921, A068601, A158620, A158622-A158624.` `Sequence in context: A075987 A135099 A073427 this_sequence A135484 A025133 A160073` `Adjacent sequences: A158618 A158619 A158620 this_sequence A158622 A158623 A158624`
	KEYWORD	`easy,nonn`
	AUTHOR	`Jonathan Vos Post (jvospost3(AT)gmail.com), Mar 23 2009`

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Last modified December 1 13:27 EST 2009. Contains 167806 sequences.

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