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A073744 Decimal expansion of tanh(1). 8
7, 6, 1, 5, 9, 4, 1, 5, 5, 9, 5, 5, 7, 6, 4, 8, 8, 8, 1, 1, 9, 4, 5, 8, 2, 8, 2, 6, 0, 4, 7, 9, 3, 5, 9, 0, 4, 1, 2, 7, 6, 8, 5, 9, 7, 2, 5, 7, 9, 3, 6, 5, 5, 1, 5, 9, 6, 8, 1, 0, 5, 0, 0, 1, 2, 1, 9, 5, 3, 2, 4, 4, 5, 7, 6, 6, 3, 8, 4, 8, 3, 4, 5, 8, 9, 4, 7, 5, 2, 1, 6, 7, 3, 6, 7, 6, 7, 1, 4, 4, 2, 1, 9, 0 (list; constant; graph; refs; listen; history; text; internal format)
OFFSET

0,1

COMMENTS

Also decimal expansion of tan(i)/i. - N. J. A. Sloane, Feb 12 2010

tanh(x) = (e^x - e^(-x)) / (e^x + e^(-x)).

REFERENCES

S. Selby, editor, CRC Basic Mathematical Tables, CRC Press, 1970, p. 218.

LINKS

Ivan Panchenko, Table of n, a(n) for n = 0..1000

Eric Weisstein's World of Mathematics, Hyperbolic Tangent

Eric Weisstein's World of Mathematics, Hyperbolic Functions

EXAMPLE

0.76159415595576488811945828260...

PROG

(PARI) tanh(1)

CROSSREFS

Cf. A004273 (continued fraction), A073747 (coth(1)=1/A073744), A073742 (sinh(1)), A073743 (cosh(1)), A073745 (csch(1)), A073746 (sech(1)).

Sequence in context: A256319 A247444 A010511 * A112253 A112252 A118321

Adjacent sequences:  A073741 A073742 A073743 * A073745 A073746 A073747

KEYWORD

cons,nonn

AUTHOR

Rick L. Shepherd, Aug 07 2002

STATUS

approved

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Last modified April 25 23:17 EDT 2017. Contains 285426 sequences.