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 A155503 #11 Aug 21 2023 10:00:46 %S A155503 1,3,6,3,4,1,6,5,1,3,9,3,0,4,2,1,0,2,0,6,9,8,0,4,7,3,1,8,1,8,2,0,8,1, %T A155503 0,5,2,4,5,3,5,5,1,8,2,3,4,6,4,9,0,5,2,7,2,3,9,7,1,0,0,1,4,1,2,3,6,4, %U A155503 3,1,3,3,9,4,7,6,4,2,7,7,1,6,8,8,8,9,6,9,2,4,5,4,2,9,2,1,6,4,9 %N A155503 Decimal expansion of log_9 (20). %H A155503 Vincenzo Librandi, <a href="/A155503/b155503.txt">Table of n, a(n) for n = 1..1000</a> %H A155503 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %e A155503 1.3634165139304210206980473181820810524535518234649052723971... %t A155503 RealDigits[Log[9, 20], 10, 100][[1]] (* _Vincenzo Librandi_, Sep 01 2013 *) %o A155503 (PARI) default(realprecision, 100); log(20)/log(9) \\ _G. C. Greubel_, Sep 01 2018 %o A155503 (Magma) SetDefaultRealField(RealField(100)); Log(20)/Log(9); // _G. C. Greubel_, Sep 01 2018 %Y A155503 Cf. decimal expansion of log_9(m): A152747 (m=2), A153205 (m=5), A153495 (m=6), A153619 (m=7), A153756 (m=8), A154160 (m=10), A154181 (m=11), A154202 (m=12), A154339 (m=13), A154469 (m=14), A154578 (m=15), A154859 (m=17), A154947 (m=18), A155061 (m=19), this sequence, A155676 (m=21), A155743 (m=22), A155829 (m=23), A155976 (m=24). %K A155503 nonn,cons %O A155503 1,2 %A A155503 _N. J. A. Sloane_, Oct 30 2009