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 A167888 #5 Jul 12 2012 00:39:51 %S A167888 1,4,216,248832,612220032,78310985281,19683000000000,4808584372417849, %T A167888 717368321110468608,5460999706120583177327,1379946262057143768386569, %U A167888 470184984576000000000000000,164890958756244164895763202881 %N A167888 n-th single or isolated number^n-th non-single or nonisolated number. %F A167888 a(n)=A167706(n)^A167707(n). %e A167888 a(1)=2^0=1, a(2)=4^1=4, a(3)=6^3=216, a(4)=12^5=248832. %Y A167888 Cf. A167706, A167707. %K A167888 nonn %O A167888 1,2 %A A167888 _Juri-Stepan Gerasimov_, Nov 14 2009 %E A167888 More terms from _R. J. Mathar_, May 30 2010