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 A143533 #29 Feb 16 2025 08:33:08 %S A143533 0,1,2,4,18,40,162,526,1708,4838,13522,34062 %N A143533 a(n) = A038705(n) - 1. %H A143533 J. K. Sikora, <a href="https://docs.google.com/file/d/0B_ZIuCD9HzQtVDFYNWQ5WFRHajg/edit">Number of Digits in the CFE of Champernowne's Constant to the Coefficient Before HWM #12</a> %H A143533 J. K. Sikora, <a href="http://arxiv.org/abs/1210.1263">On the High Water Mark Convergents of Champernowne's Constant in Base Ten</a>, arXiv:1210.1263 [math.NT], 2012. %H A143533 J. K. Sikora, <a href="https://docs.google.com/file/d/0B_ZIuCD9HzQtNnlLQUdIYTRXY2M/edit">Champernowne's Constant CFE Coefficients to HWM #12 (789 MB unzipped)</a> %H A143533 J. K. Sikora, <a href="http://code.google.com/p/champernowne-constant-cfe-coefficient-calculation-hwm/downloads/list">Champernowne's Constant CFE Calculation Program Source</a> %H A143533 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/ChampernowneConstantContinuedFraction.html">Champernowne Constant Continued Fraction</a> %Y A143533 Another version of A038705. %Y A143533 Cf. A143532 (number of decimal digits in n-th term of c.f.). %Y A143533 Cf. A143534 (number of decimal digits in a(n)th term of c.f.). %K A143533 nonn,more %O A143533 1,3 %A A143533 _Eric W. Weisstein_, Aug 22 2008 %E A143533 Added a(10) (from Mark Sofroniou), _Eric W. Weisstein_, Sep 04 2008 %E A143533 Edited by _N. J. A. Sloane_, Apr 03 2010 to reflect the fact that A038705 is the primary version of this sequence %E A143533 a(12) from _John K. Sikora_, Aug 24 2012