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 A067485 #14 Oct 22 2018 11:43:15 %S A067485 7,79792266297612001,7730993719707444524137094407, %T A067485 749048330965186233494494102694564493649, %U A067485 72574551534231909331741171093173785967490646405143 %N A067485 Powers of 7 with initial digit 7. %H A067485 Muniru A Asiru, <a href="/A067485/b067485.txt">Table of n, a(n) for n = 1..70</a> %t A067485 Select[7^Range[80],First[IntegerDigits[#]]==7&] (* _Harvey P. Dale_, Apr 16 2013 *) %o A067485 (GAP) Filtered(List([0..100],n->7^n),i->ListOfDigits(i)[1]=7); # _Muniru A Asiru_, Oct 22 2018 %Y A067485 Cf. A067480, A067481, A067482, A067483, A067484. %K A067485 base,easy,nonn %O A067485 1,1 %A A067485 _Amarnath Murthy_, Feb 09 2002 %E A067485 More terms from _Benoit Cloitre_, Feb 22 2002