id:A082878 - OEIS Search Results

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Arithmetic derivative of numbers of the form p*q^k with distinct primes p and q, k>0.

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5, 7, 16, 9, 8, 21, 24, 10, 13, 44, 15, 32, 14, 19, 12, 21, 16, 68, 48, 39, 25, 112, 45, 20, 56, 81, 1, 6, 92, 22, 31, 33, 51, 18, 72, 26, 39, 55, 80, 18, 176, 43, 22, 45, 32, 140, 20, 96, 34, 49, 24, 272, 77, 75, 1, 64, 55, 40, 240, 28, 120, 87, 61, 24, 63, 44, 128, 46, 26 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`a(n) = A003415(A084227(n)).`
	FORMULA	`a(pq^k) = (p+q)q^(k-1).`
	CROSSREFS	`Sequence in context: A116048 A120282 A132094 this_sequence A106506 A029649 A060640` `Adjacent sequences: A082875 A082876 A082877 this_sequence A082879 A082880 A082881`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), May 25 2003`

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Last modified September 8 08:06 EDT 2008. Contains 143486 sequences.

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