A176455 Decimal expansion of (20+2*sqrt(110))/5.

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

Offset

1,1

Comments

Continued fraction expansion of (20+2*sqrt(110))/5 is A010719 preceded by 8.

Links

Table of n, a(n) for n=1..105.

Index entries for algebraic numbers, degree 2.

Formula

Minimal polynomial: 5*x^2 - 40*x - 8. - Amiram Eldar, Mar 24 2026

Example

8.19523539268060618796581405471975039390108743072601...

Mathematica

RealDigits[(20 + 2*Sqrt[110])/5, 10, 120][[1]] (* Amiram Eldar, Mar 24 2026 *)

Prog

(PARI) (20+2*sqrt(110))/5 \\ Charles R Greathouse IV, May 19 2026

Crossrefs

Cf. A176221 (decimal expansion of sqrt(110)), A010719 (repeat 5, 8).

Sequence in context: A198674 A168321 A242047 * A225667 A021126 A091557

Adjacent sequences: A176452 A176453 A176454 * A176456 A176457 A176458

Keyword

cons,nonn

Author

Klaus Brockhaus, Apr 20 2010

Status

approved