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 A155532 #9 Aug 14 2023 11:03:43 %S A155532 9,8,3,9,7,4,4,4,4,2,1,3,3,5,4,0,6,0,6,0,0,2,0,7,1,9,7,2,6,0,9,0,1,9, %T A155532 0,5,3,2,1,0,9,6,3,1,3,8,1,9,3,4,6,9,7,8,7,9,3,3,2,5,5,7,4,5,0,1,6,5, %U A155532 5,6,5,3,6,1,5,8,3,2,0,6,0,8,5,2,7,4,9,3,6,1,9,5,4,8,3,2,1,7,6 %N A155532 Decimal expansion of log_21 (20). %H A155532 Vincenzo Librandi, <a href="/A155532/b155532.txt">Table of n, a(n) for n = 0..1000</a> %H A155532 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %e A155532 .98397444421335406060020719726090190532109631381934697879332... %t A155532 RealDigits[Log[21, 20], 10, 100][[1]] (* _Vincenzo Librandi_, Sep 08 2013 *) %Y A155532 Cf. decimal expansion of log_21(m): A152825 (m=2), A153097 (m=3), A153131 (m=4), A153455 (m=5), A153611 (m=6), A153632 (m=7), A153895 (m=8), A154020 (m=9), A154171 (m=10), A154192 (m=11), A154213 (m=12), A154434 (m=13), A154499 (m=14), A154707 (m=15), A154839 (m=16), A154901 (m=17), A154977 (m=18), A155129 (m=19), this sequence, A155790 (m=22), A155909 (m=23), A156028 (m=24). %Y A155532 Inverse of A155687. %K A155532 nonn,cons %O A155532 0,1 %A A155532 _N. J. A. Sloane_, Oct 30 2009