A020861 - OEIS

%I #24 Jun 25 2023 01:55:11

%S 3,1,6,9,9,2,5,0,0,1,4,4,2,3,1,2,3,6,2,9,0,7,4,7,7,8,8,7,8,9,5,6,3,3,

%T 0,1,7,5,1,9,6,2,8,8,1,5,3,8,4,9,6,2,1,2,0,9,1,1,5,0,5,3,0,9,0,8,2,1,

%U 9,6,4,5,5,5,8,8,7,1,7,1,2,5,0,4,4,5,6,0,9,4,9,8,3,6,1,7,6,4,8

%N Decimal expansion of log_2(9)

%H Vincenzo Librandi, <a href="/A020861/b020861.txt">Table of n, a(n) for n = 1..1000</a>

%H <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.

%F Equals 2 * A020857. - _Amiram Eldar_, Jun 25 2023

%e 3.16992500144231236290747788789563301751962881538496...

%t RealDigits[Log[9]/Log[2],10,120][[1]] (* _Harvey P. Dale_, Jul 08 2013 *)

%t RealDigits[Log2[9],10,120][[1]] (* _Harvey P. Dale_, May 21 2023 *)

%o (PARI) log(9)/log(2) \\ _Charles R Greathouse IV_, Aug 06 2020

%Y Cf. decimal expansion of log_2(m): A020857 (m=3), A020858 (m=5), A020859 (m=6), A020860 (m=7), this sequence, A020862 (m=10), A020863 (m=11), A020864 (m=12), A152590 (m=13), A154462 (m=14), A154540 (m=15), A154847 (m=17), A154905 (m=18), A154995 (m=19), A155172 (m=20), A155536 (m=21), A155693 (m=22), A155793 (m=23), A155921 (m=24).

%K nonn,cons

%O 1,1

%A _N. J. A. Sloane_

%E Definition improved by _J. Lowell_, May 03 2014