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 A145380 #4 Mar 31 2012 10:26:07 %S A145380 2,3,5,7,28116440335967,449177399146038697307,35452590104031691935943 %N A145380 Prime narcissistic (or Armstrong) numbers. %C A145380 Prime terms of A005188. %D A145380 J.-M. De Koninck, Ces nombres qui nous fascinent, Entry 28116440335967, p.383, Ellipses, Paris 2008. %e A145380 The 21-digit prime 449177399146038697307 is in the sequence because it is equal to 4^21 + 4^21 + 9^21 + 1^21 + 7 ^21 + ... + 9^21 + 7^21 + 3^21 + 0^21 + 7^21. %Y A145380 A005188 %K A145380 fini,full,nonn,base %O A145380 1,1 %A A145380 _Lekraj Beedassy_, Oct 09 2008