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

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, 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, 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

Offset

2,1

Links

Table of n, a(n) for n=2..106.

Formula

Equals A039661 + A093580.

Equals 2*cosh(Pi).

Equals 10 * Product_{k>=1} (1 + 4/(2*k+1)^2). - Amiram Eldar, Aug 09 2020

Example

23.1839065510430412555035041051202753...

Maple

evalf(exp(Pi)+exp(-Pi)) ;

Mathematica

RealDigits[Exp[Pi]+Exp[-Pi], 10, 120][[1]] (* Harvey P. Dale, Jan 28 2017 *)

Prog

(PARI) exp(Pi) + exp(-Pi) \\ Michel Marcus, Jun 27 2019

Crossrefs

Cf. A039661 (exp(Pi)), A093580 (exp(-Pi)), A175315, A334402 (cosh(Pi)).

Sequence in context: A081320 A147865 A266614 * A331123 A182223 A011152

Adjacent sequences: A175311 A175312 A175313 * A175315 A175316 A175317

Keyword

cons,nonn

Author

R. J. Mathar, Apr 01 2010

Status

approved