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 A038840 #18 Mar 02 2021 16:32:30 %S A038840 27,343,729,1331,2197,3375,4913,5832,19683,21952,24389,29791,35937, %T A038840 54872,59319,91125,103823,110592,117649,148877,166375,195112,205379, %U A038840 226981,250047,314432,357911,389017,421875,571787,614125,681472,753571,857375,941192,1092727 %N A038840 Cubes that are concatenations of primes. %H A038840 Sean A. Irvine, <a href="https://github.com/archmageirvine/joeis/blob/master/src/irvine/oeis/a038/A038840.java">Java program</a> (github) %e A038840 Examples from _Sean A. Irvine_, Feb 15 2021: (Start) %e A038840 3^3 = 27 = (2)(7). %e A038840 18^3 = 5832 = (5)(83)(2). %e A038840 29^3 = 24389 = (2)(43)(89). %e A038840 (End) %o A038840 (PARI) for(n=2,1e2,if(is_A152242(n^3),print1(n^3", "))) \\ _Charles R Greathouse IV_, Jun 10 2013 %Y A038840 Cf. A038692. %K A038840 nonn,base %O A038840 1,1 %A A038840 _Jeff Burch_ %E A038840 Missing a(6), a(7), a(9), a(13), a(16)-a(18), a(21), a(23) from _Charles R Greathouse IV_, Jun 10 2013 %E A038840 Missing terms inserted and more terms from _Sean A. Irvine_, Feb 15 2021