id:A081211 - OEIS Search Results

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A081210(A081210(n)).

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1, 2, 3, 3, 5, 6, 7, 7, 7, 10, 11, 7, 13, 14, 15, 15, 17, 14, 19, 15, 21, 22, 23, 21, 23, 26, 26, 21, 29, 30, 31, 31, 33, 34, 35, 21, 37, 38, 39, 35, 41, 42, 43, 33, 35, 46, 47, 35, 47, 46, 51, 39, 53, 39, 55, 47, 57, 58, 59, 35, 61, 62, 47, 62, 65, 66, 67, 51, 69, 70, 71, 47, 73 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`a(n)=r(n,2), where r is defined as in A081212, A081213.` `Different from A081213 (see example).` `a(n)=A081213(n) for n<84=A131072(1); a(A131072(n)) <> A081213(A131072(n)). - Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Jun 13 2007`
	LINKS	`R. Zumkeller, Table of n, a(n) for n = 1..10000`
	EXAMPLE	`Recall that A081210 = (in prime factorization of n: replace each prime power p^e = by the greatest square-free number <= p^e)` `Consider n = 84 = 2237` `A081210(84) = 337 = 63` `A081210(A081210(84)) = A081210(63) = 77 = 49 = a(84)` `A081210(A081210(A081210(84))) = A081210(A081210(63)) = A081210(49) = 47` `A081212(49) = 3 as A081210(47) = 47 hence A081213(84) = 47` `Therefore a(84) <> A081213(84), 49 <> 47.`
	CROSSREFS	`Adjacent sequences: A081208 A081209 A081210 this_sequence A081212 A081213 A081214` `Sequence in context: A097246 A063659 A115350 this_sequence A081213 A081210 A070321`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Mar 10 2003, Jun 12 2007`

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Last modified October 13 20:18 EDT 2008. Contains 145016 sequences.

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