id:A075255 - OEIS Search Results

Search: id:A075255

Displaying 1-1 of 1 results found.

page 1

a(n) = n - (sum of primes factors of n (with repetition)).

+0
7

1, 0, 0, 0, 0, 1, 0, 2, 3, 3, 0, 5, 0, 5, 7, 8, 0, 10, 0, 11, 11, 9, 0, 15, 15, 11, 18, 17, 0, 20, 0, 22, 19, 15, 23, 26, 0, 17, 23, 29, 0, 30, 0, 29, 34, 21, 0, 37, 35, 38, 31, 35, 0, 43, 39, 43, 35, 27, 0, 48, 0, 29, 50, 52, 47, 50, 0, 47, 43, 56, 0, 60, 0, 35, 62, 53, 59, 60 (list; graph; listen)

	OFFSET	`1,8`
	COMMENT	`a(n) = n - A001414(n).`
	EXAMPLE	`a(6)=1 because 6=2*3, sopfr(6)=2+3=5 and 6-5=1.`
	PROGRAM	`(PARI) A075255(n)=n-sum(i=1, #n=factor(n)~, n[1, i]*n[2, i]) [From M. F. Hasler (MHasler(AT)univ-ag.fr), Oct 31 2008]`
	CROSSREFS	`Cf. A001414, A008472, A075254, A075653.` `A145834 (= 0 followed by the nonzero terms of A075255) [From M. F. Hasler (MHasler(AT)univ-ag.fr), Oct 31 2008]` `Sequence in context: A087401 A127572 A021815 this_sequence A135498 A104172 A091408` `Adjacent sequences: A075252 A075253 A075254 this_sequence A075256 A075257 A075258`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Sep 10 2002`

page 1

Search completed in 0.002 seconds

Last modified December 10 12:37 EST 2009. Contains 170569 sequences.

AT&T Labs Research