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%I #9 Aug 14 2023 11:03:43
%S 9,8,3,9,7,4,4,4,4,2,1,3,3,5,4,0,6,0,6,0,0,2,0,7,1,9,7,2,6,0,9,0,1,9,
%T 0,5,3,2,1,0,9,6,3,1,3,8,1,9,3,4,6,9,7,8,7,9,3,3,2,5,5,7,4,5,0,1,6,5,
%U 5,6,5,3,6,1,5,8,3,2,0,6,0,8,5,2,7,4,9,3,6,1,9,5,4,8,3,2,1,7,6
%N Decimal expansion of log_21 (20).
%H Vincenzo Librandi, <a href="/A155532/b155532.txt">Table of n, a(n) for n = 0..1000</a>
%H <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>
%e .98397444421335406060020719726090190532109631381934697879332...
%t RealDigits[Log[21, 20], 10, 100][[1]] (* _Vincenzo Librandi_, Sep 08 2013 *)
%Y 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), A154434 (m=13), A154499 (m=14), A154707 (m=15), A154839 (m=16), A154901 (m=17), A154977 (m=18), A155129 (m=19), this sequence, A155790 (m=22), A155909 (m=23), A156028 (m=24).
%Y Inverse of A155687.
%K nonn,cons
%O 0,1
%A _N. J. A. Sloane_, Oct 30 2009
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