id:A085271 - OEIS Search Results

Search: id:A085271

Displaying 1-1 of 1 results found.

page 1

Difference between n-th composite number and its smallest prime divisor.

+0
3

2, 4, 6, 6, 8, 10, 12, 12, 14, 16, 18, 18, 20, 22, 20, 24, 24, 26, 28, 30, 30, 32, 30, 34, 36, 36, 38, 40, 4, 2, 42, 44, 46, 42, 48, 48, 50, 52, 50, 54, 54, 56, 58, 60, 60, 62, 60, 64, 66, 66, 68, 70, 72, 72, 74, 70, 76, 78, 78, 80, 82, 80, 84, 84, 86, 88, 84, 90, 90, 92, 90, 94 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`For composite number 91 we have 91-7 = 84`
	PROGRAM	`(PARI) cminusp(n) = { for(x=2, n, forprime(p=2, floor(sqrt(x)), if(x%p==0, print1(x-p, ", "); break); ) ) }`
	CROSSREFS	`Cf. A085273.` `Sequence in context: A050827 A082990 A099188 this_sequence A003972 A023853 A056526` `Adjacent sequences: A085268 A085269 A085270 this_sequence A085272 A085273 A085274`
	KEYWORD	`easy,nonn`
	AUTHOR	`Cino Hilliard (hillcino368(AT)gmail.com), Aug 12 2003`

page 1

Search completed in 0.002 seconds

Last modified November 25 08:46 EST 2009. Contains 167481 sequences.

AT&T Labs Research