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%I #24 Apr 03 2020 16:46:46
%S 1,1,5,1,2,9,2,5,4,6,4,9,7,0,2,2,8,4,2,0,0,8,9,9,5,7,2,7,3,4,2,1,8,2,
%T 1,0,3,8,0,0,5,5,0,7,4,4,3,1,4,3,8,6,4,8,8,0,1,6,6,6,3,9,5,0,4,8,3,7,
%U 8,6,3,0,4,8,3,8,6,7,6,2,4,0,1,1,7,9,9,8,6,0,2,5,4,4,7,9,9,1,4,9,1,7,0,9,8
%N Decimal expansion of log(sqrt(10)).
%C This is the ratio between the bel and the neper, i.e., 1 bel = log(sqrt(10)) nepers.
%H J. Valdes, <a href="http://dx.doi.org/10.1088/0026-1394/39/6/5">The unit one, the neper, the bel and the future of the SI</a>, Metrologia, Volume 39, Number 6 (2002), 543-550.
%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Decibel">Decibel</a>
%H <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>
%F Equals A002392/2. - _Michel Marcus_, Nov 19 2016
%e 1.1512925464970228420089957273...
%p evalf(log(sqrt(10)), 120); # _Alois P. Heinz_, Apr 03 2020
%t RealDigits[Log[Sqrt[10]], 10, 90][[1]] (* _Georg Fischer_, Apr 03 2020 *)
%o (PARI) default(realprecision, 100)
%o digits(floor(10^100*log(sqrt(10)))) \\ _Michel Marcus_, Apr 03 2020
%Y Cf. A002392.
%K nonn,cons
%O 1,3
%A _Felix Fröhlich_, Nov 11 2016
%E a(29) ff. corrected and example truncated by _Georg Fischer_ and _Michel Marcus_, Apr 03 2020
%E Offset corrected by _Alois P. Heinz_, Apr 03 2020
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