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 A260548 #11 Aug 05 2015 11:58:47 %S A260548 2,8, %T A260548 14134776518227074636666380005943348126619871175004951664972849610340958208 %N A260548 a(n) = prime(1)^prime(2)^prime(3)^...^prime(n). %e A260548 a(1) = 2; a(2) = 2^3; a(3) = 2^3^5. %Y A260548 Cf. A140319, A248012. %K A260548 nonn %O A260548 1,1 %A A260548 _Peter Woodward_, Jul 29 2015