id:A078142 - OEIS Search Results

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a(n) = the sum of the differences of the distinct prime factors p of n and the next square larger than p.

+0
9

0, 2, 1, 2, 4, 3, 2, 2, 1, 6, 5, 3, 3, 4, 5, 2, 8, 3, 6, 6, 3, 7, 2, 3, 4, 5, 1, 4, 7, 7, 5, 2, 6, 10, 6, 3, 12, 8, 4, 6, 8, 5, 6, 7, 5, 4, 2, 3, 2, 6, 9, 5, 11, 3, 9, 4, 7, 9, 5, 7, 3, 7, 3, 2, 7, 8, 14, 10, 3, 8, 10, 3, 8, 14, 5, 8, 7, 6, 2, 6, 1, 10, 17, 5, 12, 8, 8, 7, 11, 7, 5, 4, 6, 4, 10, 3, 3, 4 (list; graph; listen)

	OFFSET	`1,2`
	EXAMPLE	`a(6)=3 because 6=23 and (4-2)+(4-3)=3. a(20)=6 because 20=2^25 and (4-2)+(9-5)=6.`
	CROSSREFS	`Sequence in context: A120855 A091173 A101897 this_sequence A133422 A099312 A117505` `Adjacent sequences: A078139 A078140 A078141 this_sequence A078143 A078144 A078145`
	KEYWORD	`easy,nonn`
	AUTHOR	`Jason Earls (zevi_35711(AT)yahoo.com), Nov 20 2002`

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Last modified July 24 12:00 EDT 2008. Contains 142294 sequences.

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