id:A081811 - 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) = min{ p_i*e_i }.

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0, 2, 3, 4, 5, 2, 7, 6, 6, 2, 11, 3, 13, 2, 3, 8, 17, 2, 19, 4, 3, 2, 23, 3, 10, 2, 9, 4, 29, 2, 31, 10, 3, 2, 5, 4, 37, 2, 3, 5, 41, 2, 43, 4, 5, 2, 47, 3, 14, 2, 3, 4, 53, 2, 5, 6, 3, 2, 59, 3, 61, 2, 6, 12, 5, 2, 67, 4, 3, 2, 71, 6, 73, 2, 3, 4, 7, 2, 79, 5, 12, 2, 83, 3, 5, 2, 3, 6, 89, 2, 7, 4, 3 (list; graph; listen)

	OFFSET	`1,2`
	PROGRAM	`(PARI) a(n)=local(f); if(n<1, 0, f=factor(n); vecmin(vector(matsize(f)[1], k, f[k, 1]*f[k, 2])))`
	CROSSREFS	`Sequence in context: A059711 A043265 A026362 this_sequence A034684 A028233 A066296` `Adjacent sequences: A081808 A081809 A081810 this_sequence A081812 A081813 A081814`
	KEYWORD	`nonn`
	AUTHOR	`Benoit Cloitre (benoit7848c(AT)orange.fr), Apr 10 2003`

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Last modified July 6 17:22 EDT 2008. Contains 140988 sequences.

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