A228719 Decimal expansion of 3*Pi/5.

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

Offset: 1

Author

Omar E. Pol, Oct 03 2013

Keywords

• nonn
• cons

Comments

With offset 2, decimal expansion of 6*Pi.

6*Pi is also the surface area of a sphere whose diameter equals the square root of 6. More generally x*Pi is also the surface area of a sphere whose diameter equals the square root of x. - Omar E. Pol, Dec 22 2013

The interior angle of a regular pentagon expressed in radians. - Stefano Spezia, May 30 2025

Examples

			3*Pi/5 = 1.8849555921538759430775860299677017305183...
6*Pi = 18.849555921538759430775860299677017305183...
		

Links

• Index entries for transcendental numbers

Crossrefs

Cf. A000796, A019692, A122952, A019694, A019669 (Pi through 5*Pi).

Cf. A374172.

Programs

Mathematica

First[RealDigits[6*Pi, 10, 100]] (* Paolo Xausa, Jul 16 2024 *)

PARI

 6*Pi \\ Charles R Greathouse IV, Sep 30 2022

Formula

Equals 1/(10*A374172). - Hugo Pfoertner, Jul 16 2024