A354128 Decimal expansion of 7 - 4*sqrt(3).

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

Offset

-1,1

Comments

The smallest root of x^2 - 14*x + 1 = 0.

Links

Table of n, a(n) for n=-1..90.

Nicholas Owad and Anastasiia Tsvietkova, Random meander model for links, arXiv:2205.03451 [math.GT], 2022, p. 13.

Formula

Equals (2 - sqrt(3))^2 = A019913^2. - Jianing Song, May 27 2022

Example

0.07179676972449082589021463397651...

Mathematica

First[RealDigits[N[7-4Sqrt[3], 92]]]

Crossrefs

Cf. A002194, A010502, A019913 (square root), A354129 (multiplicative inverse).

Sequence in context: A151785 A093564 A081776 * A256255 A131115 A151778

Adjacent sequences: A354125 A354126 A354127 * A354129 A354130 A354131

Keyword

nonn,cons,easy

Author

Stefano Spezia, May 18 2022

Status

approved