A176397 Decimal expansion of (15+sqrt(255))/5.

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

Offset

1,1

Comments

Continued fraction expansion of (15+sqrt(255))/5 is A010717 preceded by 6, or equivalently A010717(n+1).

Links

Vincenzo Librandi, Table of n, a(n) for n = 1..1000

Index entries for algebraic numbers, degree 2.

Formula

Minimal polynomial: 5*x^2 - 30*x - 6. - Amiram Eldar, Apr 01 2026

Example

6.19374388453426239981404903539612276831346994087508...

Mathematica

RealDigits[(15 + Sqrt[255])/5, 10, 100][[1]] (* Vincenzo Librandi, Sep 24 2013 *)

Crossrefs

Cf. A176110 (decimal expansion of sqrt(255)), A010717 (repeat 5, 6).

Sequence in context: A349141 A358968 A246771 * A245724 A021908 A093358

Adjacent sequences: A176394 A176395 A176396 * A176398 A176399 A176400

Keyword

cons,nonn

Author

Klaus Brockhaus, Apr 16 2010

Status

approved