id:A136743 - OEIS Search Results

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Number of prime factors in the n-th run of square-free numbers.

+0
6

2, 4, 3, 5, 1, 1, 5, 2, 5, 6, 5, 5, 3, 2, 1, 2, 5, 3, 6, 6, 3, 6, 3, 6, 1, 2, 6, 1, 5, 6, 6, 6, 4, 4, 1, 6, 4, 5, 6, 4, 1, 1, 5, 5, 2, 1, 6, 3, 4, 5, 6, 7, 4, 6, 1, 1, 6, 4, 7, 6, 6, 6, 3, 7, 1, 2, 6, 1, 5, 2, 1, 7, 6, 3, 7, 1, 1, 5, 3, 5, 8, 5, 1, 2, 4, 6, 2, 1, 6, 3, 6, 7, 4, 7, 4, 1, 2, 2, 6, 1, 6, 6, 2, 6, 5 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`a(n) = A001221(A136742(n)) = A001222(A136742(n));` `a(A136744(n)) = n and a(m) <> n for m < A136744(n).`
	LINKS	`R. Zumkeller, Table of n, a(n) for n = 1..1000` `Eric Weisstein's World of Mathematics, Squarefree`
	FORMULA	`a(n) = SUM(A001221(A072284(n)+k): 0<=k<A120992(n)).`
	EXAMPLE	`a(10)=A001221(A136742(10))=A001221(39270)=A001221(235711*17)=6.`
	CROSSREFS	`Cf. A005117.` `Sequence in context: A050514 A133702 A080001 this_sequence A011387 A019656 A134017` `Adjacent sequences: A136740 A136741 A136742 this_sequence A136744 A136745 A136746`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jan 20 2008`

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Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

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