id:A136196 - OEIS Search Results

Search: id:A136196

Displaying 1-1 of 1 results found.

page 1

Numbers n such that n and n+2 are consecutiive semiprimes.

+0
3

4, 49, 55, 91, 119, 143, 159, 183, 185, 203, 215, 219, 235, 247, 265, 287, 289, 299, 303, 319, 321, 327, 339, 391, 411, 413, 415, 451, 469, 471, 515, 517, 527, 533, 535, 543, 551, 579, 581, 589, 667, 669, 679, 685, 687, 695, 721, 753, 779, 789, 791, 813, 815 (list; graph; listen)

	OFFSET	`1,1`
	LINKS	`Zak Seidov, Table of n, a(n) for n = 1..1000.`
	EXAMPLE	`4 and 6 are 1st and 2nd semiprimes,` `49 and 51 are 17th and 18th semiprimes,` `55 and 57 are 19th and 20th semiprimes.`
	CROSSREFS	`Cf. A001358, A065516.` `Adjacent sequences: A136193 A136194 A136195 this_sequence A136197 A136198 A136199` `Sequence in context: A136384 A123373 A132510 this_sequence A061100 A147803 A112533`
	KEYWORD	`nonn`
	AUTHOR	`Zak Seidov (zakseidov(AT)yahoo.com), Dec 21 2007`

page 1

Search completed in 0.002 seconds

Last modified January 7 17:35 EST 2009. Contains 152824 sequences.

AT&T Labs Research