OFFSET
1,1
REFERENCES
David Wells, The Penguin Dictionary of Curious and Interesting Numbers. Penguin Books, NY, 1986, Revised edition 1987. See p. 55.
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
FORMULA
Equals 1+A020858. - R. J. Mathar, Oct 25 2008
MATHEMATICA
RealDigits[Log[2, 10], 10, 100][[1]] (* Vincenzo Librandi, Aug 29 2013 *)
PROG
(PARI) log(10)/log(2) \\ Charles R Greathouse IV, Aug 06 2020
CROSSREFS
Cf. decimal expansion of log_2(m): A020857 (m=3), A020858 (m=5), A020859 (m=6), A020860 (m=7), A020861 (m=9), this sequence, 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).
KEYWORD
nonn,cons
AUTHOR
EXTENSIONS
Definition improved by J. Lowell, May 03 2014
STATUS
approved