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 A155553 #11 Aug 14 2023 11:01:47 %S A155553 1,8,9,1,6,6,8,1,4,9,6,0,8,1,5,2,8,5,1,8,9,7,8,8,2,7,0,4,8,1,8,4,1,2, %T A155553 3,2,4,1,4,1,2,2,5,3,2,9,5,8,4,0,0,0,3,3,8,3,6,6,2,9,2,8,9,2,3,4,6,6, %U A155553 2,4,3,6,3,9,2,4,4,1,3,2,6,3,9,3,5,9,7 %N A155553 Decimal expansion of log_5 (21). %H A155553 Vincenzo Librandi, <a href="/A155553/b155553.txt">Table of n, a(n) for n = 1..1000</a> %H A155553 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %e A155553 1.8916681496081528518978827048184123241412253295840003383662... %t A155553 RealDigits[Log[5, 21], 10, 100][[1]] (* _Vincenzo Librandi_, Aug 31 2013 *) %o A155553 (PARI) log(21)/log(5) \\ _Charles R Greathouse IV_, May 15 2020 %Y A155553 Cf. decimal expansion of log_5(m): A152675 (m=2), A152914 (m=3), A153101 (m=4), A153461 (m=6), A153616 (m=7), A153739 (m=8), A154008 (m=9), A154156 (m=10), A154177 (m=11), A154198 (m=12), A154265 (m=13), A154465 (m=14), A154564 (m=15), A154759 (m=16), A154850 (m=17), A154910 (m=18), A155035 (m=19), A155184 (m=20), this sequence, A155696 (m=22), A155821 (m=23), A155958 (m=24). %K A155553 nonn,cons %O A155553 1,2 %A A155553 _N. J. A. Sloane_, Oct 30 2009