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 A080809 #12 Aug 07 2015 03:15:16 %S A080809 6,16,216,2085136,62019685191371643, %T A080809 82626753081964483505319130781618465733184 %N A080809 a(1) = 6; thereafter, a(n)= smallest n-th power obtained by inserting digits anywhere in a(n-1). %F A080809 a(n)=A080514(n), n>1. - _R. J. Mathar_, Sep 18 2008 %p A080809 buffedStr := proc(n,candid) local f ; if length(n) = 0 then RETURN(true) ; fi ; f := SearchText(substring(n,1),candid) ; if f = 0 then RETURN(false) ; else if buffedStr(substring(n,2..-1),substring(candid,f+1..-1)) = true then RETURN(true) ; else RETURN(false) ; fi ; fi ; end: A080809 := proc(preva,n) local i,tst ; i := 1 ; while true do tst := i^n; if buffedStr(convert(preva,string),convert(tst,string)) = true then RETURN(tst) ; fi ; i := i+1 ; od: end: an :=6 ; for n from 2 to 15 do an := A080809(an,n) ; end ; # _R. J. Mathar_, Sep 20 2006 %Y A080809 Cf. A080804, A080805, A080806, A080807, A080808, A080810, A080811, A080812. %K A080809 nonn,base %O A080809 1,1 %A A080809 _Amarnath Murthy_, Mar 22 2003 %E A080809 More terms from _R. J. Mathar_, Sep 20 2006 %E A080809 Copied a term from A080514. - _Sean A. Irvine_, Sep 01 2009