id:A083720 - OEIS Search Results

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Product of primes less than greatest prime factor of n but not dividing n.

+0
3

1, 1, 2, 1, 6, 1, 30, 1, 2, 3, 210, 1, 2310, 15, 2, 1, 30030, 1, 510510, 3, 10, 105, 9699690, 1, 6, 1155, 2, 15, 223092870, 1, 6469693230, 1, 70, 15015, 6, 1, 200560490130, 255255, 770, 3, 7420738134810, 5, 304250263527210, 105, 2, 4849845 (list; graph; listen)

	OFFSET	`1,3`
	COMMENT	`a(n)=A002110(A049084(A006530(n)))/A007947(n); a(A000040(k))=A000961(k))=A002110(k-1);` `a(n)=1 iff n=m*A002110(k) and A006530(m)<=A000040(k).`
	CROSSREFS	`Cf. A079067, A083722.` `Sequence in context: A060173 A059344 A109193 this_sequence A055878 A030304 A133200` `Adjacent sequences: A083717 A083718 A083719 this_sequence A083721 A083722 A083723`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 04 2003`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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