This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A248208 #14 Oct 08 2014 16:52:53 %S A248208 3,11,47,83,1063,1637,1699,7529,7673,23059,28097,29573,34157,34961, %T A248208 36587,40897,43609,44711,101839,102763,103423,104087,104393,106363, %U A248208 117437,117499,124471,125407,126011,129419,134753,135007,137393,139487,143879,143971,145037 %N A248208 Primes p such that p^3 is the concatenation of two k-digit primes where k is half the number of decimal digits in p^3. %H A248208 Jens Kruse Andersen, <a href="/A248208/b248208.txt">Table of n, a(n) for n = 1..10000</a> %e A248208 47 is prime and 47^3 = 103823 is the concatenation of two primes (103 and 823) that are of the same length (here, their length is 3). So, 47 is a member of this sequence. %e A248208 73 is not in the sequence since 73^3 = 389017, where 389 is a 3-digit prime but 017 is a 2-digit prime. - _Jens Kruse Andersen_, Oct 06 2014 %o A248208 (PARI) %o A248208 forprime(p=1,10^6,d=digits(p^3);if((#d)%2==0,if(isprime((p^3)\(10^(#d/2)))&&isprime((p^3)%(10^(#d/2)))&&#Str((p^3)%(10^(#d/2)))==#d/2,print1(p,", ")))) %Y A248208 Cf. A030078, A105184, A030461, A153048, A080906, A248046. %K A248208 nonn,base %O A248208 1,1 %A A248208 _Derek Orr_, Oct 03 2014 %E A248208 Terms and PARI program corrected by _Jens Kruse Andersen_, Oct 06 2014