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 11-13 of 13 results.

A117031 Decimal expansion of (abs(log(sine of 1 radian)))^(-1).

Original entry on oeis.org

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

Views

Author

Mohammad K. Azarian, Apr 15 2006

Keywords

Examples

			5.79361700783125457021565456107259321984626006399307030247119036251877
		

Crossrefs

Programs

A117032 Decimal expansion of 1/abs(log_10(sine of 1 radian)).

Original entry on oeis.org

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

Views

Author

Mohammad K. Azarian, Apr 15 2006

Keywords

Examples

			13.340296156749014006523321821030660812538428507009782217256716005020
		

Crossrefs

Programs

  • Mathematica
    RealDigits[1/Abs[Log10[Sin[1]]],10,120][[1]] (* Harvey P. Dale, Jan 19 2020 *)

Formula

Equals 1/A117028. - R. J. Mathar, Apr 23 2009

Extensions

Clarified base of the logarithm in the definition - R. J. Mathar, Apr 23 2009

A246820 Decimal expansion of integral_{0..infinity} x*exp(-x)/(1+x^2) dx.

Original entry on oeis.org

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

Views

Author

Jean-François Alcover, Sep 04 2014

Keywords

Examples

			0.3433779615564270328325330038583124340012440194999075192...
		

Crossrefs

Programs

  • Mathematica
    RealDigits[(1/2)*Sin[1]*(Pi - 2*SinIntegral[1]) - Cos[1]*CosIntegral[1], 10, 104] // First

Formula

(1/2)*sin(1)*(Pi - 2*Si(1)) - cos(1)*Ci(1), where Si is the sine integral function and Ci the cosine integral function.
Also equals -integral_{0..1} log(x)/(1+log(x)^2) dx.
Also equals cot(1)*A224518 + Ci(1)*csc(1).
Previous Showing 11-13 of 13 results.