A176533 Decimal expansion of (15+4*sqrt(15))/3.

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

Offset

2,4

Comments

Continued fraction expansion of (15+4*sqrt(15))/3 is A010726 preceded by 10.

Links

Table of n, a(n) for n=2..106.

Index entries for algebraic numbers, degree 2.

Formula

Minimal polynomial: 3*x^2 - 30*x - 5. - Amiram Eldar, May 02 2026

Example

10.1639777949432225135723538663765328144438956070554...

Mathematica

RealDigits[(15+4*Sqrt[15])/3, 10, 120][[1]] (* Harvey P. Dale, Nov 10 2024 *)

Crossrefs

Cf. A010472 (decimal expansion of sqrt(15)), A010726 (repeat 6, 10).

Sequence in context: A037905 A180596 A154465 * A214497 A177015 A355971

Adjacent sequences: A176530 A176531 A176532 * A176534 A176535 A176536

Keyword

cons,nonn

Author

Klaus Brockhaus, Apr 24 2010

Status

approved