This site is supported by donations to The OEIS Foundation.

 Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing. Other ways to donate

 Hints (Greetings from The On-Line Encyclopedia of Integer Sequences!)
 A176656 The positions of single (or isolated or non-twin) primes in A000040. 3

%I

%S 1,9,12,15,16,19,22,23,24,25,30,31,32,37,38,39,40,47,48,51,54,55,56,

%T 59,62,63,66,67,68,71,72,73,74,75,76,77,78,79,80,85,86,87,88,91,92,93,

%U 94,95,96,97,100,101,102,103,106,107,108,111,112,115,118,119,122,123,124

%N The positions of single (or isolated or non-twin) primes in A000040.

%F A000040(a(n))=A007510(k).

%p A176656 := proc(n) numtheory[pi](A007510(n)) ; end proc: seq(A176656(n),n=1..120) ; # _R. J. Mathar_, Apr 26 2010

%K nonn

%O 1,2

%A _Juri-Stepan Gerasimov_, Apr 23 2010

%E Corrected (32 inserted, one of the 94 removed, 103 inserted, 121 replaced by 122) by _R. J. Mathar_, Apr 26 2010

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

Last modified December 8 08:49 EST 2019. Contains 329862 sequences. (Running on oeis4.)