A054042 Decimal expansion of 1 - 1/sqrt(10).

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

Offset

0,1

Links

Table of n, a(n) for n=0..98.

Index entries for algebraic numbers, degree 2.

Formula

Minimal polynomial: 10*x^2 - 20*x + 9. - Amiram Eldar, May 25 2026

Example

0.68377223398316206680011064555672814662804448606747...

Mathematica

RealDigits[1-1/Sqrt[10], 10, 120][[1]] (* Harvey P. Dale, May 12 2019 *)

Prog

(PARI) 1-1/sqrt(10) \\ Charles R Greathouse IV, Apr 04 2026

Crossrefs

Cf. A010467.

Sequence in context: A021940 A316256 A387131 * A184084 A346402 A394011

Adjacent sequences: A054039 A054040 A054041 * A054043 A054044 A054045

Keyword

nonn,cons

Author

N. J. A. Sloane, Apr 13 2000

Status

approved