cp's OEIS Frontend

A175314 Decimal expansion of exp(Pi) + exp(-Pi).

%I A175314 #21 Jan 30 2025 10:34:11
%S A175314 2,3,1,8,3,9,0,6,5,5,1,0,4,3,0,4,1,2,5,5,5,0,3,5,0,4,1,0,5,1,2,0,2,7,
%T A175314 5,3,9,1,5,4,1,8,3,4,3,5,2,4,1,0,8,4,5,0,7,6,4,2,5,7,6,6,0,9,6,9,2,5,
%U A175314 3,9,3,1,1,6,4,4,7,4,7,0,7,5,1,2,1,5,1,1,1,9,5,7,0,2,9,4,5,0,3,0,4,0,6,2,9
%N A175314 Decimal expansion of exp(Pi) + exp(-Pi).
%H A175314 <a href="/index/Tra#transcendental">Index entries for transcendental numbers</a>.
%F A175314 Equals A039661 + A093580.
%F A175314 Equals 2*cosh(Pi).
%F A175314 Equals 10 * Product_{k>=1} (1 + 4/(2*k+1)^2). - _Amiram Eldar_, Aug 09 2020
%e A175314 23.1839065510430412555035041051202753...
%p A175314 evalf(exp(Pi)+exp(-Pi)) ;
%t A175314 RealDigits[Exp[Pi]+Exp[-Pi],10,120][[1]] (* _Harvey P. Dale_, Jan 28 2017 *)
%o A175314 (PARI) exp(Pi) + exp(-Pi) \\ _Michel Marcus_, Jun 27 2019
%o A175314 (PARI) 2*cosh(Pi) \\ _Charles R Greathouse IV_, Jan 30 2025
%Y A175314 Cf. A039661 (exp(Pi)), A093580 (exp(-Pi)), A175315, A334402 (cosh(Pi)).
%K A175314 cons,nonn
%O A175314 2,1
%A A175314 _R. J. Mathar_, Apr 01 2010