This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A069814 #26 Jun 24 2025 04:31:11
%S A069814 7,6,5,0,0,9,9,5,4,5,5,0,7,3,2,1,2,2,6,5,5,3,2,1,7,4,2,4,8,2,8,1,5,2,
%T A069814 1,9,2,0,0,3,5,2,1,3,7,4,7,5,0,4,3,3,2,3,1,6,2,4,7,0,7,1,0,7,4,0,0,1,
%U A069814 9,2,3,1,9,9,4,4,8,1,4,1,2,7,8,0,8,2
%N A069814 Decimal expansion of root of the equation x*cosh(x)=1.
%H A069814 Eric Weisstein's World of Mathematics, <a href="https://mathworld.wolfram.com/HyperbolicSecant.html">Hyperbolic Secant</a>
%H A069814 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%e A069814 0.76500995455073212265532174248281521920035213747504332316247071...
%p A069814 Digits:= 120:
%p A069814 fsolve(x*cosh(x)=1,x=0..1); # _Robert Israel_, Jan 07 2015
%t A069814 RealDigits[x/.FindRoot[x*Cosh[x]==1,{x,1},WorkingPrecision->120]][[1]] (* _Harvey P. Dale_, Jan 06 2015 *)
%o A069814 (PARI) solve(x=0, 1, x*cosh(x)-1) \\ _Michel Marcus_, Jan 06 2015
%Y A069814 Cf. A205571, A385281, A385282.
%K A069814 cons,easy,nonn
%O A069814 0,1
%A A069814 _Benoit Cloitre_, Apr 30 2002
%E A069814 Corrected by _Harvey P. Dale_, Jan 06 2015