id:A161163 - OEIS Search Results

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Indices of the isolated primes in the prime sequence, if indices are odd.

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1, 9, 15, 19, 23, 25, 31, 37, 39, 47, 51, 55, 59, 63, 67, 71, 73, 75, 77, 79, 85, 87, 91, 93, 95, 97, 101, 103, 107, 111, 115, 119, 123, 125, 127, 129, 131, 133, 135, 137, 139, 147, 151, 155, 157, 159, 161, 163, 165, 167, 169, 175, 181, 185, 187, 189, 193, 195, 197 (list; graph; listen)

	OFFSET	`1,2`
	COMMENT	`The indices of the isolated primes A007510 in A000040 are 2=A000040(1),` `23=A000040(9), 37=A000040(12), 47=A000040(15). The subset of odd indices defines the OEIS sequence.`
	FORMULA	`A005408 INTERSECT { A049084(A007510(k)), k =1,2,3...}`
	CROSSREFS	`Cf. A007510.` `Sequence in context: A093642 A118236 A070876 this_sequence A058211 A038599 A079364` `Adjacent sequences: A161160 A161161 A161162 this_sequence A161164 A161165 A161166`
	KEYWORD	`nonn`
	AUTHOR	`Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), Jun 04 2009`
	EXTENSIONS	`Entries checked by R. J. Mathar (mathar(AT)strw.leidenuniv.nl), Sep 23 2009`

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Last modified December 7 23:50 EST 2009. Contains 170430 sequences.

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