A161163 Indices of the isolated primes in the prime sequence, if indices are odd.

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

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 A330438

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