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 A259848 #28 Aug 28 2015 17:37:58 %S A259848 3,73,173,6173,66173,366173,2366173,12366173,912366173,2912366173, %T A259848 72912366173,372912366173,8372912366173,18372912366173, %U A259848 818372912366173,4818372912366173 %N A259848 Suffixes of 4818372912366173 (all primes). %H A259848 Matematico Fresnillense, <a href="http://matematicofresnillense.blogspot.mx/2015/08/piramides-de-numeros-primos-pyramids-of.html">Pyramids of Primes</a> %F A259848 a(n) = 4818372912366173 mod 10^n. %e A259848 .......................3 %e A259848 .......................73 %e A259848 .......................173 %e A259848 .......................6173 %e A259848 .......................66173 %e A259848 .......................366173 %e A259848 .......................2366173 %e A259848 .......................12366173 %e A259848 .......................912366173 %e A259848 .......................2912366173 %e A259848 .......................72912366173 %e A259848 .......................372912366173 %e A259848 .......................8372912366173 %e A259848 .......................18372912366173 %e A259848 .......................818372912366173 %e A259848 .......................4818372912366173 %Y A259848 Cf. A101115, A101118. %K A259848 nonn,fini,full,base,less %O A259848 1,1 %A A259848 _José de Jesús Camacho Medina_, Aug 17 2015