id:A098147 - OEIS Search Results

Search: id:A098147

Displaying 1-1 of 1 results found.

page 1

Difference between first odd semiprime > 10^n and 10^n.

+0
8

5, 11, 3, 1, 1, 1, 1, 1, 13, 3, 7, 7, 15, 13, 3, 3, 15, 7, 1, 19, 3, 19, 13, 29, 7, 7, 3, 27, 13, 3, 1, 9, 9, 9, 27, 7, 3, 7, 49, 55, 81, 3, 3, 9, 7, 11, 69, 7, 19, 13, 39, 7, 1, 3, 13, 13, 39, 77, 27, 63, 31, 51, 19, 9, 27, 3, 1, 39, 19, 41, 21, 67, 37, 63, 69, 33, 3, 9, 37, 67, 121, 9, 21 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`Dario Alpern, Factorization using the Elliptic Curve Method.`
	FORMULA	`a(n)=A098146(n)-10^n.`
	EXAMPLE	`a(2)=11: The first odd semiprime following 10^2 is 111=3*37; 111-100=11.`
	CROSSREFS	`Cf. A098146, A033873 difference between first prime > 10^n and 10^n.` `Sequence in context: A159199 A125683 A125685 this_sequence A100298 A066461 A117069` `Adjacent sequences: A098144 A098145 A098146 this_sequence A098148 A098149 A098150`
	KEYWORD	`nonn`
	AUTHOR	`Hugo Pfoertner (hugo(AT)pfoertner.org), Aug 28 2004`

page 1

Search completed in 0.002 seconds

Last modified December 16 17:18 EST 2009. Contains 170825 sequences.

AT&T Labs Research