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A073745
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Decimal expansion of csch(1).
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7
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8, 5, 0, 9, 1, 8, 1, 2, 8, 2, 3, 9, 3, 2, 1, 5, 4, 5, 1, 3, 3, 8, 4, 2, 7, 6, 3, 2, 8, 7, 1, 7, 5, 2, 8, 4, 1, 8, 1, 7, 2, 4, 6, 6, 0, 9, 1, 0, 3, 3, 9, 6, 1, 6, 9, 9, 0, 4, 2, 1, 1, 5, 1, 7, 2, 9, 0, 0, 3, 3, 6, 4, 3, 2, 1, 4, 6, 5, 1, 0, 3, 8, 9, 9, 7, 3, 0, 1, 7, 7, 3, 2, 8, 8, 9, 3, 8, 1, 2, 3, 6, 2, 4, 4
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OFFSET
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0,1
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COMMENTS
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csch(x) = 2/(e^x - e^(-x)).
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REFERENCES
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Samuel M. Selby (ed.), CRC Basic Mathematical Tables, CRC Press, 1970, p. 218.
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LINKS
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FORMULA
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Equals Sum_{k>=0} B(2*k) * (2 - 2^(2*k)) / (2*k)!, where B(k) is the k-th Bernoulli number. - Amiram Eldar, May 15 2021
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EXAMPLE
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0.85091812823932154513384276328...
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MATHEMATICA
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RealDigits[Csch[1], 10, 100][[1]] (* Amiram Eldar, May 15 2021 *)
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PROG
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(PARI) 1/sinh(1)
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CROSSREFS
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KEYWORD
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AUTHOR
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STATUS
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approved
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