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 A087668 #19 Mar 30 2012 17:38:51
%S A087668 8,9,11,13,15,133,2317,39845,108167,46779959,70246181,248897669,
%T A087668 452691117,1137506437,3089581031
%N A087668 Indices of records in A087664.
%C A087668 No other terms below 10^10.
%o A087668 (PARI) A087664(n)={ local(x,s) ; x=n/4 ; s=0 ; while( type(x)!="t_INT", x *= floor(x) ; s++ ; ) ; return(s) ; } { rec=-1 ; for(n=8,1000000, a=A087664(n) ; if(a>rec, rec=a ; print(n) ; ) ; ) ; } - _R. J. Mathar_, Nov 25 2006
%Y A087668 Cf. A087664, A087667.
%K A087668 nonn,more
%O A087668 1,1
%A A087668 _N. J. A. Sloane_, Sep 27 2003
%E A087668 More terms from _R. J. Mathar_, Nov 25 2006
%E A087668 a(9)-a(15) from _Max Alekseyev_, Jul 30 2011