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 A080409 #11 Feb 17 2021 09:21:44 %S A080409 2,3,1,5,9,8,4,7,3,6,1,5,7,8,9,1,3,8,3,3,7,8,5,9,5,3,5,0,9,2,0,4,0,6, %T A080409 8,1,6,1,7,4,4,9,6,8,5,7,3,8,1,3,5,7,7,6,4,3,4,2,2,0,8,1,7,7,1,2,1,0, %U A080409 1,9,5,9,8,7,2,8,7,6,9,0,1,2,7,4,5,7,1,9,8,7,0,1,3,2,2,3,8,5,3,5 %N A080409 Decimal expansion of the number which results when the Boustrophedon transform of the continued fraction of e (A080408, A003417) is interpreted as a continued fraction. %H A080409 J. Millar, N. J. A. Sloane and N. E. Young, A new operation on sequences: the Boustrophedon transform, J. Combin. Theory, 17A (1996) 44-54 (<a href="http://neilsloane.com/doc/bous.txt">Abstract</a>, <a href="http://neilsloane.com/doc/bous.pdf">pdf</a>, <a href="http://neilsloane.com/doc/bous.ps">ps</a>). %H A080409 N. J. A. Sloane, <a href="/transforms.txt">Transforms</a>. %H A080409 <a href="/index/Bo#boustrophedon">Index entries for sequences related to boustrophedon transform</a> %e A080409 2.315984736157891383378595350920406816174496857381357764342208... %Y A080409 Cf. A003417, A001113, A080408. %K A080409 nonn,easy,cons %O A080409 1,1 %A A080409 Mark Hudson (mrmarkhudson(AT)hotmail.com), Feb 17 2003 %E A080409 Offset corrected by _R. J. Mathar_, Feb 05 2009