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 A020861 #26 Jun 01 2025 22:25:15 %S A020861 3,1,6,9,9,2,5,0,0,1,4,4,2,3,1,2,3,6,2,9,0,7,4,7,7,8,8,7,8,9,5,6,3,3, %T A020861 0,1,7,5,1,9,6,2,8,8,1,5,3,8,4,9,6,2,1,2,0,9,1,1,5,0,5,3,0,9,0,8,2,1, %U A020861 9,6,4,5,5,5,8,8,7,1,7,1,2,5,0,4,4,5,6,0,9,4,9,8,3,6,1,7,6,4,8 %N A020861 Decimal expansion of log_2(9). %H A020861 Vincenzo Librandi, <a href="/A020861/b020861.txt">Table of n, a(n) for n = 1..1000</a> %H A020861 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>. %F A020861 Equals 2 * A020857. - _Amiram Eldar_, Jun 25 2023 %e A020861 3.16992500144231236290747788789563301751962881538496... %t A020861 RealDigits[Log[9]/Log[2],10,120][[1]] (* _Harvey P. Dale_, Jul 08 2013 *) %t A020861 RealDigits[Log2[9],10,120][[1]] (* _Harvey P. Dale_, May 21 2023 *) %o A020861 (PARI) log(9)/log(2) \\ _Charles R Greathouse IV_, Aug 06 2020 %Y A020861 Cf. decimal expansion of log_2(m): A020857 (m=3), A020858 (m=5), A020859 (m=6), A020860 (m=7), this sequence, A020862 (m=10), A020863 (m=11), A020864 (m=12), A152590 (m=13), A154462 (m=14), A154540 (m=15), A154847 (m=17), A154905 (m=18), A154995 (m=19), A155172 (m=20), A155536 (m=21), A155693 (m=22), A155793 (m=23), A155921 (m=24). %K A020861 nonn,cons %O A020861 1,1 %A A020861 _N. J. A. Sloane_ %E A020861 Definition improved by _J. Lowell_, May 03 2014