# Greetings from The On-Line Encyclopedia of Integer Sequences! http://oeis.org/ Search: id:a046852 Showing 1-1 of 1 %I A046852 #14 Nov 21 2013 12:47:07 %S A046852 1,5,31,247,2927,297937,39263057,5959285217,1083245729387, %T A046852 207735268337827,65180687788497661,23058721563350868863, %U A046852 8618531530355825754989,3307472964561561236731357 %N A046852 Numerator of sum of reciprocals of first n palindromic primes. %H A046852 Vincenzo Librandi, Table of n, a(n) for n = 1..100 %e A046852 1/2 + 1/3 + 1/5 + 1/7 + 1/11 + 1/101 + ... gives 1/2, 5/6, 31/30, 247/210, ... %t A046852 palQ[n_]:=Module[{idn=IntegerDigits[n]},idn==Reverse[idn]]; Numerator[ Accumulate[1/#&/@Select[Prime[Range[200]],palQ]]] (* _Harvey P. Dale_, Dec 21 2011 *) %Y A046852 Cf. A046853, A002385. %K A046852 nonn,frac,base %O A046852 1,2 %A A046852 _G. L. Honaker, Jr._ %E A046852 More terms from _Erich Friedman_, Jun 03 2001 # Content is available under The OEIS End-User License Agreement: http://oeis.org/LICENSE