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 A067483 #29 Oct 17 2018 09:57:51
%S A067483 5,59604644775390625,582076609134674072265625,
%T A067483 5684341886080801486968994140625,
%U A067483 55511151231257827021181583404541015625,542101086242752217003726400434970855712890625
%N A067483 Powers of 5 with initial digit 5.
%C A067483 Each term also has final digit 5. - _Muniru A Asiru_, Oct 13 2018
%H A067483 Muniru A Asiru, <a href="/A067483/b067483.txt">Table of n, a(n) for n = 1..114</a>
%t A067483 Select[5^Range[70],First[IntegerDigits[#]]==5&] (* _Harvey P. Dale_, Apr 01 2011 *)
%o A067483 (GAP) k:=5;; Filtered(List([0..100],n->k^n),i->ListOfDigits(i)[1]=k); # _Muniru A Asiru_, Oct 06 2018
%o A067483 (PARI) lista(nn) = {for (n=1, nn, if (digits(p=5^n)[1] == 5, print1(p, ", ")););} \\ _Michel Marcus_, Oct 14 2018
%Y A067483 Subsequence of A000351 (powers of 5).
%Y A067483 Similar entries with another digit: A067480 (2), A067481 (3), A067482 (4).
%K A067483 base,easy,nonn
%O A067483 1,1
%A A067483 _Amarnath Murthy_, Feb 09 2002
%E A067483 Edited by _Frank Ellermann_, Feb 11 2002
%E A067483 One more term from _Harvey P. Dale_, Apr 01 2011