cp's OEIS Frontend

This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.

Previous Showing 11-16 of 16 results.

A132713 Decimal expansion of 23/Pi.

Original entry on oeis.org

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

Views

Author

Omar E. Pol, Aug 31 2007

Keywords

Examples

			7.321127382227185445368653115135660653585143704060996642392697826709252691....
		

Crossrefs

Programs

Extensions

More terms from Vladimir Joseph Stephan Orlovsky, Dec 03 2009

A132715 Decimal expansion of 25/Pi.

Original entry on oeis.org

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

Views

Author

Omar E. Pol, Aug 31 2007, Dec 30 2008

Keywords

Comments

Starting with 0, 0, 7, 9, 5, ... this is also the decimal expansion of 1/(4*Pi). Example: 0.079577471545947667884441881686257181... - Omar E. Pol, Jan 18 2013

Examples

			7.9577471545947667884441881686257181...
		

Crossrefs

Programs

Formula

1/(4*Pi) = Integral_{x>=0} cos(Pi*x/2)/(exp(2*Pi*sqrt(x))-1) dx (Ramanujan, 1913). - Amiram Eldar, Jan 01 2025

Extensions

More digits from R. J. Mathar, Aug 17 2009

A132716 Decimal expansion of 26/Pi.

Original entry on oeis.org

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

Views

Author

Omar E. Pol, Aug 31 2007

Keywords

Examples

			8.276057040778557459981955695370746825791901578503735334878701891062633....
		

Crossrefs

Programs

Extensions

More terms from Vladimir Joseph Stephan Orlovsky, Dec 03 2009

A132718 Decimal expansion of 28/Pi.

Original entry on oeis.org

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

Views

Author

Omar E. Pol, Aug 31 2007

Keywords

Examples

			8.912676813146138803...
		

Crossrefs

Programs

A132719 Decimal expansion of 29/Pi.

Original entry on oeis.org

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

Views

Author

Omar E. Pol, Aug 31 2007

Keywords

Examples

			9.230986699...
		

Crossrefs

Programs

Extensions

More terms from Harvey P. Dale, Jan 21 2013

A354249 Decimal expansion of 27*sqrt(3) / (2*Pi).

Original entry on oeis.org

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

Views

Author

Bernard Schott, May 20 2022

Keywords

Comments

For any triangle ABC (see Crux Mathematicorum):
(sin(A) + sin(B) + sin(C)) * (1/A + 1/B + 1/C) >= 27*sqrt(3) / (2*Pi),
where (A,B,C) are the angles in radians.
Equality stands iff triangle ABC is equilateral.

Examples

			7.442940088194192668402907727...
		

Crossrefs

Programs

  • Maple
    evalf(27*sqrt(3)/(2*Pi),110);
  • Mathematica
    RealDigits[(27*Sqrt[3]/(2*Pi)), 10, 110][[1]] (* Amiram Eldar, May 21 2022; corrected by Georg Fischer, Aug 04 2024 *)

Formula

Equals A010527 * A132717.

Extensions

a(100) corrected by Georg Fischer, Aug 04 2024
Previous Showing 11-16 of 16 results.