A330062 Decimal expansion of the solution of 1/x + sech(x) = 1.

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

Offset

1,2

Links

Table of n, a(n) for n=1..86.

Example

x = 1.617499897241320956979283167...

Mathematica

r = x /. FindRoot[1/x + 1/Cosh[x] == 1, {x, 2, 10}, WorkingPrecision -> 210]
RealDigits[r][[1]] (* A330062 *)
Plot[1/x + 1/Cosh[x] - 1, {x, 1, 2}]

Crossrefs

Cf. A330063, A330064.

Sequence in context: A131231 A200307 A260632 * A198420 A377343 A110942

Adjacent sequences: A330059 A330060 A330061 * A330063 A330064 A330065

Keyword

nonn,cons,easy

Author

Clark Kimberling, Jan 04 2020

Status

approved