id:A081810 - OEIS Search Results

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If n = p_1^e_1 * ... * p_k^e_k, p_1 < ... < p_k primes, then a(n) = Max{ p_i*e_i }.

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0, 2, 3, 4, 5, 3, 7, 6, 6, 5, 11, 4, 13, 7, 5, 8, 17, 6, 19, 5, 7, 11, 23, 6, 10, 13, 9, 7, 29, 5, 31, 10, 11, 17, 7, 6, 37, 19, 13, 6, 41, 7, 43, 11, 6, 23, 47, 8, 14, 10, 17, 13, 53, 9, 11, 7, 19, 29, 59, 5, 61, 31, 7, 12, 13, 11, 67, 17, 23, 7, 71, 6, 73, 37, 10, 19, 11, 13, 79, 8, 12 (list; graph; listen)

	OFFSET	`1,2`
	PROGRAM	`(PARI) a(n)=local(f); if(n<1, 0, f=factor(n); vecmax(vector(matsize(f)[1], k, f[k, 1]*f[k, 2])))`
	CROSSREFS	`Sequence in context: A141295 A134198 A060653 this_sequence A071829 A067620 A053585` `Adjacent sequences: A081807 A081808 A081809 this_sequence A081811 A081812 A081813`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 10 2003`

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Last modified September 6 16:04 EDT 2008. Contains 143483 sequences.

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