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 A046076 #11 Feb 16 2025 08:32:38 %S A046076 103,107,138,159,179,187,192,199,205,211,217,218,234,249,254,264,269, %T A046076 285,288,293,296,299,304,305,316,347,350,354,364,368,378,383,384,385, %U A046076 390,393,406,416,420,427,436,443,445,449,451,454,457,462,463,485,488 %N A046076 Indices of binary undulants; numbers n such that 2^n contains the alternating sequence of digits 010... or 101... %D A046076 C. A. Pickover, ``The Undulation of the Monks.'' Ch. 20 in Keys to Infinity. New York: W.H.Freeman, pp. 159-161 1995. %D A046076 C. A. Pickover, "Wonders of Numbers", Oxford New York 2001, Chapter 52, pp. 123-124, 316-317. %H A046076 C. A. Pickover, "Wonders of Numbers, Adventures in Mathematics, Mind and Meaning," <a href="http://www.zentralblatt-math.org/zmath/en/search/?q=an:0983.00008&format=complete">Zentralblatt review</a> %H A046076 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/UndulatingNumber.html">Undulating Number.</a> %Y A046076 Cf. A033619, A046075, A046077. %K A046076 nonn,base %O A046076 1,1 %A A046076 _Eric W. Weisstein_