Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 61st year, we have over 378,000 sequences, and we’ve reached 11,000 citations (which often say “discovered thanks to the OEIS”).
%I #12 May 15 2019 12:42:44
%S 4,5,9,1,1,7,4,2,9,8,7,8,5,2,7,6,1,4,8,0,6,8,5,9,6,0,9,8,3,7,8,9,8,0,
%T 7,7,5,1,9,5,6,6,4,4,0,7,2,7,7,1,6,6,9,6,7,8,5,9,9,5,0,6,9,3,2,8,8,2,
%U 1,9,3,2,5,3,6,8,2,6,6,2,5,3,3,6,8,1,8,8,8,5,2,4,7,5,7,9,5,2,3,1,1,8
%N Decimal expansion of the ratio of the length of the latus rectum arc of any parabola to its focal length: sqrt(8) + log(3 + sqrt(8)).
%C Twice the universal parabolic constant A103710.
%H <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>
%e 4.591174298785276148068596098378980775195664407277166967859950693...
%t First@ RealDigits[N[# + Log[3 + #] &@ Sqrt@ 8, 102]] (* _Michael De Vlieger_, Oct 11 2015 *)
%o (PARI) sqrt(8) + log(3 + sqrt(8)) \\ _Michel Marcus_, Oct 11 2015
%Y Equals twice A103710. Equals A010466 + A244920.
%K cons,easy,nonn
%O 1,1
%A _Martin Janecke_, Oct 11 2015