id:A163489 - OEIS Search Results

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Indices n such that composite(n)/3 is prime.

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2, 4, 8, 12, 21, 26, 35, 40, 49, 63, 68, 81, 92, 97, 106, 121, 136, 140, 154, 165, 171, 185, 195, 210, 229, 240, 245, 254, 260, 270, 305, 315, 330, 336, 360, 365, 379, 395, 405, 421, 437, 442, 467, 472, 483, 488, 517, 547, 557, 562, 573, 589, 594, 619, 634, 650 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`a(1)=2(2th composite/3=6/3=2=prime); a(2)=4(4th composite/3=9/3=3=prime).`
	CROSSREFS	`Cf. A000027, A000040, A002808.` `Sequence in context: A103258 A100684 A131770 this_sequence A076651 A081410 A027677` `Adjacent sequences: A163486 A163487 A163488 this_sequence A163490 A163491 A163492`
	KEYWORD	`nonn`
	AUTHOR	`Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jul 29 2009`
	EXTENSIONS	`48 replaced by 49, 62 replaced by 63, 96 by 97 etc - R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Oct 09 2009`

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Last modified November 23 10:40 EST 2009. Contains 167421 sequences.

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