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 A155591 #14 Aug 14 2023 10:51:30 %S A155591 1,5,6,4,5,7,5,0,3,4,0,5,3,5,7,9,6,1,3,8,0,4,5,5,0,1,6,7,1,7,4,9,0,8, %T A155591 5,3,6,1,4,3,2,2,7,9,1,1,1,8,6,7,9,2,5,9,5,0,4,5,4,0,9,2,6,2,3,0,7,7, %U A155591 5,2,3,1,4,2,0,0,4,0,9,4,9,9,0,1,0,2,8,1,5,4,4,5,8,4,3,6,1,2,6 %N A155591 Decimal expansion of log_7(21). %H A155591 Vincenzo Librandi, <a href="/A155591/b155591.txt">Table of n, a(n) for n = 1..1000</a> %H A155591 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %e A155591 1.5645750340535796138045501671749085361432279111867925950454... %t A155591 RealDigits[Log[7, 21], 10, 100][[1]] (* _Vincenzo Librandi_, Aug 31 2013 *) %o A155591 (PARI) default(realprecision, 100); log(21)/log(7) \\ _G. C. Greubel_, Sep 02 2018 %o A155591 (Magma) SetDefaultRealField(RealField(100)); Log(21)/Log(7); // _G. C. Greubel_, Sep 02 2018 %Y A155591 Cf. decimal expansion of log_7(m): A152713 (m=2), A152945 (m=3), A153103 (m=4), A153203 (m=5), A153463 (m=6), A153755 (m=8), A113211 (m=9), A154158 (m=10), A154179 (m=11), A154200 (m=12), A154294 (m=13), A154467 (m=14), A154572 (m=15), A154793 (m=16), A154857 (m=17), A154912 (m=18), A155059 (m=19), A155496 (m=20), this sequence, A155735 (m=22), A155824 (m=23), A155964 (m=24). %K A155591 nonn,cons %O A155591 1,2 %A A155591 _N. J. A. Sloane_, Oct 30 2009