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A161163 Indices of the isolated primes in the prime sequence, if indices are odd. 0
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; refs; listen; history; text; internal format)
OFFSET

1,2

COMMENTS

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.

LINKS

Table of n, a(n) for n=1..59.

FORMULA

A005408 INTERSECT { A049084(A007510(k)), k =1,2,3...}

CROSSREFS

Cf. A007510.

Sequence in context: A230306 A070876 A266419 * A058211 A038599 A321342

Adjacent sequences:  A161160 A161161 A161162 * A161164 A161165 A161166

KEYWORD

nonn

AUTHOR

Juri-Stepan Gerasimov, Jun 04 2009

EXTENSIONS

Entries checked by R. J. Mathar, Sep 23 2009

STATUS

approved

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Last modified October 20 20:24 EDT 2019. Contains 328273 sequences. (Running on oeis4.)