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A073746 Decimal expansion of sech(1). 8
6, 4, 8, 0, 5, 4, 2, 7, 3, 6, 6, 3, 8, 8, 5, 3, 9, 9, 5, 7, 4, 9, 7, 7, 3, 5, 3, 2, 2, 6, 1, 5, 0, 3, 2, 3, 1, 0, 8, 4, 8, 9, 3, 1, 2, 0, 7, 1, 9, 4, 2, 0, 2, 3, 0, 3, 7, 8, 6, 5, 3, 3, 7, 3, 1, 8, 7, 1, 7, 5, 9, 5, 6, 4, 6, 7, 1, 2, 8, 3, 0, 2, 8, 0, 8, 5, 4, 7, 8, 5, 3, 0, 7, 8, 9, 2, 8, 9, 2, 3, 8, 4, 8, 4 (list; constant; graph; refs; listen; history; internal format)
OFFSET

0,1

COMMENTS

sech(x) = 2/(e^x + e^(-x))

REFERENCES

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

LINKS

Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.

Eric Weisstein's World of Mathematics, Link to a section of The World of Mathematics.

EXAMPLE

0.64805427366388539957497735322...

PROG

(PARI) 1/cosh(1)

CROSSREFS

Cf. A068118 (continued fraction), A073743 (cosh(1)=1/A073746), A073742 (sinh(1)), A073744 (tanh(1)), A073745 (csch(1)), A073747 (coth(1)).

Sequence in context: A075495 A070652 A195487 * A010496 A199436 A035415

Adjacent sequences:  A073743 A073744 A073745 * A073747 A073748 A073749

KEYWORD

cons,nonn

AUTHOR

Rick L. Shepherd (rshepherd2(AT)hotmail.com), Aug 07 2002

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Last modified February 15 07:58 EST 2012. Contains 205717 sequences.