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%I #22 Sep 01 2018 09:14:36
%S 1,2,8,7693,8510,12941,146134,637571,27198825,53205635,6283318531,
%T 7167375533,226095996998,435966708249
%N Numbers k such that sum of the first k primes is a palindrome.
%C a(13) > pi(10^12). - _Donovan Johnson_, Apr 25 2010
%C a(15) > 2.83*10^12. - _Giovanni Resta_, Sep 01 2018
%H C. Rivera, <a href="http://www.primepuzzles.net/puzzles/puzz_007.htm">Source</a>
%e 2+3+5+7+11+13+17+19 = 77.
%o (PARI)
%o rev(n)=r="";d=digits(n);for(i=1,#d,r=concat(Str(d[i]),r));eval(r)
%o s=0;for(n=1,10^6,s+=prime(n);if(rev(s)==s,print1(n,", "))) \\ _Derek Orr_, Aug 16 2014
%Y Cf. A007504, A038583, A038584, A058845.
%K nonn,base,more
%O 1,2
%A _Jud McCranie_
%E a(11)-a(12) from _Donovan Johnson_, Apr 25 2010
%E a(13)-a(14) from _Giovanni Resta_, Aug 30 2018
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