id:A028236 - OEIS Search Results

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

+0
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1, 1, 1, 1, 1, 5, 1, 1, 1, 7, 1, 7, 1, 9, 8, 1, 1, 11, 1, 9, 10, 13, 1, 11, 1, 15, 1, 11, 1, 31, 1, 1, 14, 19, 12, 13, 1, 21, 16, 13, 1, 41, 1, 15, 14, 25, 1, 19, 1, 27, 20, 17, 1, 29, 16, 15, 22, 31, 1, 47, 1, 33, 16, 1, 18, 61, 1, 21, 26, 59, 1, 17, 1, 39, 28, 23, 18, 71, 1, 21, 1, 43 (list; graph; listen)

	OFFSET	`1,6`
	FORMULA	`Fraction is additive with a(p^e) = 1/p^e.`
	CROSSREFS	`Denominator is n (A000027).` `Sequence in context: A035316 A068316 A028235 this_sequence A066504 A140210 A010130` `Adjacent sequences: A028233 A028234 A028235 this_sequence A028237 A028238 A028239`
	KEYWORD	`nonn,easy`
	AUTHOR	`N. J. A. Sloane (njas(AT)research.att.com).`
	EXTENSIONS	`More terms from Erich Friedman (erich.friedman(AT)stetson.edu).`

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Last modified November 25 20:09 EST 2009. Contains 167514 sequences.

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