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 A143705 #4 Mar 30 2012 18:52:27 %S A143705 27,1024,78125,125,1024,169,256,100000,16926659444736,25,441,2097152, %T A143705 41753905413413116367045797,125,49,4096,16384,29791,1296,8589934592, %U A143705 2476099,81,72759576141834259033203125,9261,3375 %N A143705 (1, 2, 3, 2^2, 5, 2*3, 7, 2^3, 3^2, 2*5, 11, 2^2*3, 13, 2*7, 3*5,..) becomes ((1+2)^3, (2+2)^5, (2+3)^7, (2+3)^3, (2+2)^5, (11+2)^2, (3+13)^2, (7+3)^5,..). %e A143705 a(8)=(7+3)^5=10^5=100000. %e A143705 a(9)=(2+4)^17=6^17=16926659444736.. %e A143705 a(10)=(2+3)^2=5^2=25. %e A143705 a(11)=(19+2)^2=21^2=441. %e A143705 a(12)=(5+3)^7=8^7=2097152, %e A143705 etc. %Y A143705 Cf. A141287, A141261, A136735. %K A143705 nonn %O A143705 1,1 %A A143705 _Juri-Stepan Gerasimov_, Nov 13 2008 %E A143705 Corrected (161051 removed) and extended by _R. J. Mathar_, Apr 18 2010