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 A321694 #10 Jul 27 2023 11:17:11 %S A321694 0,0,1,0,1,1,1,1,0,0,0,1,0,1,1,1,0,1,0,0,1,0,0,1,0,1,0,0,0,1,0,0,1,1, %T A321694 0,0,0,1,1,1,0,1,0,1,1,1,1,0,1,1,1,0,0,0,1,1,0,1,0,1,0,1,0,1,0,1,1,0, %U A321694 0,0,0,1,1,1,0,1,1,0,0,1,0,1,0,1,0,1,1 %N A321694 Digits of the 2-adic integer log(-3). %C A321694 Appears to equal A309754 shifted right one place. - _R. J. Mathar_, Jul 27 2023 %H A321694 Wikipedia, <a href="https://en.wikipedia.org/wiki/P-adic_number">p-adic number</a> %F A321694 a(n) = (A321691(n+1) - A321691(n))/2^n. %e A321694 log(-3) = ...01110001100100010100100101110100011110100. %o A321694 (PARI) a(n) = lift(log(-3 + O(2^(n+1))))\2^n; %Y A321694 Cf. A321691, A152228 (log(5)). %K A321694 nonn,base %O A321694 0,1 %A A321694 _Jianing Song_, Nov 17 2018