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A161163 Indices of the isolated primes in the prime sequence, if indices are odd. 0

%I #3 Mar 30 2012 18:52:33

%S 1,9,15,19,23,25,31,37,39,47,51,55,59,63,67,71,73,75,77,79,85,87,91,

%T 93,95,97,101,103,107,111,115,119,123,125,127,129,131,133,135,137,139,

%U 147,151,155,157,159,161,163,165,167,169,175,181,185,187,189,193,195,197

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

%C The indices of the isolated primes A007510 in A000040 are 2=A000040(1),

%C 23=A000040(9), 37=A000040(12), 47=A000040(15). The subset of odd indices defines the OEIS sequence.

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

%Y Cf. A007510.

%K nonn

%O 1,2

%A _Juri-Stepan Gerasimov_, Jun 04 2009

%E Entries checked by _R. J. Mathar_, Sep 23 2009

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Last modified March 29 08:13 EDT 2024. Contains 371265 sequences. (Running on oeis4.)