login
A175315
Decimal expansion of exp(Pi) - exp(-Pi).
4
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
2,1
LINKS
N. Kurokawa, M. Wakayama, A generalization of Lerch’s formula, Czechoslovak Math. J. 54 (2004), 941-947.
FORMULA
Equals A039661 - A093580.
Equals 2*sinh(Pi).
EXAMPLE
23.0974787145154967559546686307...
MAPLE
evalf(exp(Pi)-exp(-Pi)) ;
MATHEMATICA
RealDigits[Exp[Pi]-Exp[-Pi], 10, 120][[1]] (* Harvey P. Dale, Aug 28 2019 *)
PROG
(PARI) exp(Pi) + exp(-Pi) \\ Michel Marcus, Jun 29 2019
CROSSREFS
Cf. A039661 (exp(Pi)), A093580 (exp(-Pi)), A175314.
Sequence in context: A074760 A137914 A098989 * A180186 A336083 A256294
KEYWORD
cons,nonn
AUTHOR
R. J. Mathar, Apr 01 2010
STATUS
approved