OFFSET
1,4
LINKS
Vincenzo Librandi, Table of n, a(n) for n = 1..1000
EXAMPLE
1.0162865569130280545672402562169359633040269725700108215084...
MATHEMATICA
RealDigits[Log[20, 21], 10, 100][[1]] (* Vincenzo Librandi, Sep 05 2013 *)
CROSSREFS
Cf. decimal expansion of log_20(m): A152821 (m=2), A153035 (m=3), A153124 (m=4), A153454 (m=5), A153610 (m=6), A153630 (m=7), A153872 (m=8), A154019 (m=9), A154170 (m=10), A154191 (m=11), A154212 (m=12), A154433 (m=13), A154492 (m=14), A154705 (m=15), A154838 (m=16), A154900 (m=17), A154976 (m=18), A155115 (m=19), this sequence, A155789 (m=22), A155907 (m=23), A156015 (m=24).
Inverse of A155532.
KEYWORD
nonn,cons
AUTHOR
N. J. A. Sloane, Oct 30 2009
STATUS
approved