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 A155172 #11 Aug 21 2023 09:50:14 %S A155172 4,3,2,1,9,2,8,0,9,4,8,8,7,3,6,2,3,4,7,8,7,0,3,1,9,4,2,9,4,8,9,3,9,0, %T A155172 1,7,5,8,6,4,8,3,1,3,9,3,0,2,4,5,8,0,6,1,2,0,5,4,7,5,6,3,9,5,8,1,5,9, %U A155172 3,4,7,7,6,6,0,8,6,2,5,2,1,5,8,5,0,1,3,9,7,4,3,3,5,9,3,7,0,1,5 %N A155172 Decimal expansion of log_2 (20). %C A155172 Equals 2 + A020858 = 1 + A020862 = A016643 / A002162. - _Michel Marcus_, Jul 28 2013 %H A155172 Vincenzo Librandi, <a href="/A155172/b155172.txt">Table of n, a(n) for n = 1..1000</a> %H A155172 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %e A155172 4.3219280948873623478703194294893901758648313930245806120547... %t A155172 RealDigits[Log[2, 20], 10, 100][[1]] (* _Vincenzo Librandi_, Aug 29 2013 *) %Y A155172 Cf. decimal expansion of log_2(m): A020857 (m=3), A020858 (m=5), A020859 (m=6), A020860 (m=7), A020861 (m=9), 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), this sequence, A155536 (m=21), A155693 (m=22), A155793 (m=23), A155921 (m=24). %K A155172 nonn,cons %O A155172 1,1 %A A155172 _N. J. A. Sloane_, Oct 30 2009