A139771 - OEIS

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A139771

Exponents of prime factorization are factorial numbers in descending order.

1, 2, 6, 60, 20160, 23543886643200, 41101884684637603112076605638990269409595309948928000000 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,2`
	FORMULA	`a(n) = 2^(n!) * 3^((n-1)!) * 5^((n-2)!) * ... * p(n+1)^(0!);`
	EXAMPLE	`a(4) = (2^6)(3^2)(5)(7) = 20160`
	PROG	`J Program` `*/ @ (p: ^ (!@\|.)) @ i.`
	CROSSREFS	`Sequence in context: A001577 A156503 A077175 * A129665 A173606 A134706` `Adjacent sequences: A139768 A139769 A139770 * A139772 A139773 A139774`
	KEYWORD	`easy,nonn`
	AUTHOR	`Dan Brown (dbrown(AT)certicom.com), May 20 2008`

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Last modified February 15 09:26 EST 2012. Contains 205753 sequences.