id:A028235 - OEIS Search Results

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If n = Product (p_j^k_j), a(n) = numerator of Sum 1/p_j (denominator is A007947).

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1, 1, 1, 1, 1, 5, 1, 1, 1, 7, 1, 5, 1, 9, 8, 1, 1, 5, 1, 7, 10, 13, 1, 5, 1, 15, 1, 9, 1, 31, 1, 1, 14, 19, 12, 5, 1, 21, 16, 7, 1, 41, 1, 13, 8, 25, 1, 5, 1, 7, 20, 15, 1, 5, 16, 9, 22, 31, 1, 31, 1, 33, 10, 1, 18, 61, 1, 19, 26, 59, 1, 5, 1, 39, 8, 21, 18, 71, 1, 7, 1, 43, 1, 41, 22, 45, 32 (list; graph; listen)

	OFFSET	`1,6`
	FORMULA	`Fraction is additive with a(p^e) = 1/p.`
	CROSSREFS	`Sequence in context: A102280 A035316 A068316 this_sequence A028236 A066504 A140210` `Adjacent sequences: A028232 A028233 A028234 this_sequence A028236 A028237 A028238`
	KEYWORD	`nonn,easy`
	AUTHOR	`njas`
	EXTENSIONS	`More terms from Erich Friedman (erich.friedman(AT)stetson.edu).`

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Last modified September 5 17:15 EDT 2008. Contains 143476 sequences.

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