A175315 Decimal expansion of exp(Pi) - exp(-Pi).

2, 3, 0, 9, 7, 4, 7, 8, 7, 1, 4, 5, 1, 5, 4, 9, 6, 7, 5, 5, 9, 5, 4, 6, 6, 8, 6, 3, 0, 7, 7, 6, 8, 1, 9, 3, 6, 8, 9, 9, 0, 3, 7, 8, 1, 3, 2, 7, 8, 9, 5, 7, 8, 9, 1, 0, 4, 6, 4, 3, 2, 6, 7, 2, 2, 1, 2, 3, 2, 9, 1, 5, 8, 4, 9, 3, 3, 4, 3, 4, 8, 1, 5, 8, 1, 8, 8, 3, 2, 0, 3, 7, 1, 0, 5, 6, 4, 8, 1, 3, 5, 2, 8, 8, 9

Offset: 2

Author

R. J. Mathar, Apr 01 2010

Keywords

• cons
• nonn

Examples

			23.0974787145154967559546686307...
		

Links

• N. Kurokawa, M. Wakayama, A generalization of Lerch’s formula, Czechoslovak Math. J. 54 (2004), 941-947.
• Index entries for transcendental numbers.

Crossrefs

Cf. A039661 (exp(Pi)), A093580 (exp(-Pi)), A175314.

Programs

Maple

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

Mathematica

RealDigits[Exp[Pi]-Exp[-Pi],10,120][[1]] (* Harvey P. Dale, Aug 28 2019 *)

PARI

exp(Pi) + exp(-Pi) \\ Michel Marcus, Jun 29 2019

PARI

2*sinh(Pi) \\ Charles R Greathouse IV, Jan 30 2025

Formula

Equals A039661 - A093580.

Equals 2*sinh(Pi).