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 A070691 #3 Mar 30 2012 18:50:23 %S A070691 1,4,27,256,3125,46656,823543,16777216,387420489,1,2048,531441, %T A070691 67108864,6103515625,470184984576,33232930569601,2251799813685248, %U A070691 150094635296999121,10000000000000000000 %N A070691 (Sum of digits of n)^n. %Y A070691 Cf. A007953, A067040. %K A070691 nonn,base %O A070691 1,2 %A A070691 _Reinhard Zumkeller_, May 13 2002