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 A154909 #13 Feb 15 2025 16:39:01 %S A154909 2,0,8,4,9,6,2,5,0,0,7,2,1,1,5,6,1,8,1,4,5,3,7,3,8,9,4,3,9,4,7,8,1,6, %T A154909 5,0,8,7,5,9,8,1,4,4,0,7,6,9,2,4,8,1,0,6,0,4,5,5,7,5,2,6,5,4,5,4,1,0, %U A154909 9,8,2,2,7,7,9,4,3,5,8,5,6,2,5,2,2,2,8,0,4,7,4,9,1,8,0,8,8,2,4 %N A154909 Decimal expansion of log_4 (18). %H A154909 Vincenzo Librandi, <a href="/A154909/b154909.txt">Table of n, a(n) for n = 1..1000</a> %H A154909 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %F A154909 Equals A020857+1/2. - _R. J. Mathar_, Feb 15 2025 %e A154909 2.0849625007211561814537389439478165087598144076924810604557... %t A154909 RealDigits[Log[4, 18], 10, 100][[1]] (* _Vincenzo Librandi_, Aug 30 2013 *) %Y A154909 Cf. A020857 (log_2(3)). %Y A154909 Cf. decimal expansion of log_4(m): A094148 (m=3), A153201 (m=5), A153460 (m=6), A153615 (m=7), A154155 (m=10), A154176 (m=11), A154197 (m=12), A154224 (m=13), A154464 (m=14), A154543 (m=15), A154849 (m=17), this sequence, A155004 (m=19), A155183 (m=20), A155545 (m=21), A155695 (m=22), A155818 (m=23), A155936 (m=24). %K A154909 nonn,cons %O A154909 1,1 %A A154909 _N. J. A. Sloane_, Oct 30 2009