A176457 Decimal expansion of (28+2*sqrt(210))/7.

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

Offset

1,1

Comments

Continued fraction expansion of (28+2*sqrt(210))/7 is A010728 preceded by 8.

Links

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

Index entries for algebraic numbers, degree 2.

Formula

a(n) = A171539(n-1) for n > 1.

Minimal polynomial: 7*x^2 - 56*x - 8. - Amiram Eldar, Apr 25 2026

Example

8.140393356054125306776761187762791920897180821359706...

Mathematica

RealDigits[(28+2Sqrt[210])/7, 10, 120][[1]] (* Harvey P. Dale, Apr 07 2018 *)

Crossrefs

Cf. A171539 (decimal expansion of sqrt(6/35)), A176441 (decimal expansion of sqrt(210)), A010728 (repeat 7, 8).

Sequence in context: A011469 A140457 A358286 * A110194 A199283 A395721

Adjacent sequences: A176454 A176455 A176456 * A176458 A176459 A176460

Keyword

cons,nonn

Author

Klaus Brockhaus, Apr 20 2010

Status

approved