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 A132639 #8 Sep 18 2014 22:41:49 %S A132639 1,1,4,3125,11112006825558016 %N A132639 Catalan number C(n) raised to power C(n). %F A132639 a(n) = (C(n))^(C(n)). %e A132639 a(4)=3125 because C(4)=5 and we can write 3125=5^5 or 3125=5*5*5*5*5. %Y A132639 Cf. A000108, A008973, A008974, A051674. %K A132639 nonn %O A132639 1,3 %A A132639 _Omar E. Pol_, Aug 24 2007