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 A066336 #8 Feb 03 2020 15:22:42 %S A066336 0,1,2,3,4,5,6,7,14,15,-1,-1,-1,-1,-1,-1,16,17,18,19,20,21,22,23,30, %T A066336 31,-1,-1,-1,-1,-1,-1,32,33,34,35,36,37,38,39,46,47,-1,-1,-1,-1,-1,-1, %U A066336 48,49,50,51,52,53,54,55,62,63,-1,-1,-1,-1,-1,-1,64,65,66,67,68,69,70,71,78,79,-1,-1,-1,-1,-1,-1,80,81,82,83,84,85,86 %N A066336 Decimal equivalent of A066334. %K A066336 easy,sign,base %O A066336 0,3 %A A066336 _George E. Antoniou_, Dec 15 2001 %E A066336 Corrected and extended by _Joshua Zucker_, Jun 21 2006