A097106 - OEIS

This site is supported by donations to The OEIS Foundation.

A097106

(Smallest prime power >= n) - (greatest prime power <= n).

0, 0, 0, 0, 0, 2, 0, 0, 0, 2, 0, 2, 0, 3, 3, 0, 0, 2, 0, 4, 4, 4, 0, 2, 0, 2, 0, 2, 0, 2, 0, 0, 5, 5, 5, 5, 0, 4, 4, 4, 0, 2, 0, 4, 4, 4, 0, 2, 0, 4, 4, 4, 0, 6, 6, 6, 6, 6, 0, 2, 0, 3, 3, 0, 3, 3, 0, 4, 4, 4, 0, 2, 0, 6, 6, 6, 6, 6, 0, 2, 0, 2, 0, 6, 6, 6, 6, 6, 0, 8, 8, 8, 8, 8, 8, 8, 0, 4, 4, 4, 0, 2, 0, 4, 4 (list; graph; refs; listen; history; internal format)

	OFFSET	`1,6`
	COMMENTS	`a(n) = A000015(n) - A031218(n);` `a(n) = 0 iff n is a prime power.`
	CROSSREFS	`Cf. A000961, A072680.` `Sequence in context: A172246 A087893 A079169 * A175801 A165619 A088886` `Adjacent sequences: A097103 A097104 A097105 * A097107 A097108 A097109`
	KEYWORD	`nonn`
	AUTHOR	`Reinhard Zumkeller (reinhard.zumkeller(AT)gmail.com), Sep 15 2004`

Content is available under The OEIS End-User License Agreement .

Last modified February 17 23:38 EST 2012. Contains 206085 sequences.