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 A154434 #9 Jul 13 2025 12:54:54 %S A154434 8,4,2,4,8,0,0,3,0,9,1,7,2,6,5,1,0,6,5,5,8,7,8,0,4,9,8,8,4,0,0,8,3,3, %T A154434 9,8,3,3,3,4,8,6,8,6,4,7,0,7,6,2,0,9,7,5,5,4,3,8,4,5,6,3,9,7,6,3,7,8, %U A154434 2,7,3,0,0,2,9,7,5,0,3,7,6,4,9,6,5,0,2,8,1,0,6,3,4,6,8,3,7,4,3 %N A154434 Decimal expansion of log_21 (13). %H A154434 Vincenzo Librandi, <a href="/A154434/b154434.txt">Table of n, a(n) for n = 0..1000</a> %H A154434 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a> %F A154434 Equals A016636 / A016644. - _R. J. Mathar_, Jul 13 2025 %e A154434 .84248003091726510655878049884008339833348686470762097554384... %t A154434 RealDigits[Log[21, 13], 10, 100][[1]] (* _Vincenzo Librandi_, Sep 07 2013 *) %Y A154434 Cf. decimal expansion of log_21(m): A152825 (m=2), A153097 (m=3), A153131 (m=4), A153455 (m=5), A153611 (m=6), A153632 (m=7), A153895 (m=8), A154020 (m=9), A154171 (m=10), A154192 (m=11), A154213 (m=12), this sequence, A154499 (m=14), A154707 (m=15), A154839 (m=16), A154901 (m=17), A154977 (m=18), A155129 (m=19), A155532 (m=20), A155790 (m=22), A155909 (m=23), A156028 (m=24). %K A154434 nonn,cons %O A154434 0,1 %A A154434 _N. J. A. Sloane_, Oct 30 2009