%I #8 Aug 21 2023 09:54:26
%S 2,1,9,6,1,5,8,7,1,1,3,8,9,3,8,0,1,4,4,4,4,7,8,5,4,1,3,0,5,8,9,8,2,3,
%T 6,5,8,7,0,0,4,2,0,5,1,6,8,2,9,3,1,0,9,2,2,0,6,6,5,2,2,1,8,9,3,0,5,7,
%U 0,9,5,3,8,3,2,8,2,7,5,7,7,4,5,1,0,0,7,0,7,3,7,0,4,4,1,4,9,5,1
%N Decimal expansion of log_4 (21).
%H Vincenzo Librandi, <a href="/A155545/b155545.txt">Table of n, a(n) for n = 1..1000</a>
%H <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>
%e 2.1961587113893801444478541305898236587004205168293109220665...
%t RealDigits[Log[4, 21], 10, 100][[1]] (* _Vincenzo Librandi_, Aug 30 2013 *)
%Y Cf. decimal expansion of log_4(m): A094148 (m=3), A153201 (m=5), A153460 (m=6), A153615 (m=7), A154155 (m=10), A154176 (m=11), A154197 (m=12), A154224 (m=13), A154464 (m=14), A154543 (m=15), A154849 (m=17), A154909 (m=18), A155004 (m=19), A155183 (m=20), this sequence, A155695 (m=22), A155818 (m=23), A155936 (m=24).
%K nonn,cons
%O 1,1
%A _N. J. A. Sloane_, Oct 30 2009