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.

Showing 1-10 of 11 results. Next

A019986 Decimal expansion of tangent of 88 degrees.

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane

Keywords

Comments

Also the decimal expansion of cotangent of 2 degrees. - Ivan Panchenko, Sep 01 2014
The least positive k such that floor(10^k tan 88°) is prime is k = 289 = 17^2. The sum of digits of the resulting prime is the prime 1279, whose sum of digits is the same as that of k, again a prime, 19. - M. F. Hasler, May 19 2023

Links

Crossrefs

Cf. A019899 - A019987 (same for 1, ..., 89 degrees).

Programs

  • Mathematica
    RealDigits[Tan[88 Degree],10,120][[1]] (* Harvey P. Dale, Aug 29 2016 *)

Formula

Equals A019897 / A019811. - R. J. Mathar, Feb 12 2025

A113815 Decimal expansion of (cotangent of 1 degree)^(1/5).

Original entry on oeis.org

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

Views

Author

Mohammad K. Azarian, Jan 22 2006

Keywords

Examples

			Equals (cot(Pi/180))^(1/5) = 2.247065367379405144530132....

Links

Crossrefs

Cf. A073449; A019987.

Programs

  • Mathematica
    RealDigits[(Cot[Pi/180])^(1/5), 10, 50][[1]] (* G. C. Greubel, Jun 08 2017 *)
RealDigits[Surd[Cot[1 Degree],5],10,120][[1]] (* Harvey P. Dale, Mar 09 2019 *)
  • PARI
    (1/tan(Pi/180))^(1/5) \\ G. C. Greubel, Jun 08 2017

A113794 Decimal expansion of (cotangent of 1 degree)^2.

Original entry on oeis.org

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

Views

Author

Mohammad K. Azarian, Jan 21 2006

Keywords

Examples

			3282.139703... = 1/A111493.

Crossrefs

Cf. A073449, A019987.

Programs

  • Maple
    cot(Pi/180)^2; evalf(%) ; # R. J. Mathar, Apr 03 2011
  • Mathematica
    RealDigits[Cot[1 Degree]^2,10,120][[1]] (* Harvey P. Dale, Mar 12 2023 *)

Extensions

Offset changed by Mohammad K. Azarian, Dec 13 2008

A113809 Decimal expansion of (cotangent of 1 degree)^3.

Original entry on oeis.org

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

Views

Author

Mohammad K. Azarian, Jan 22 2006

Keywords

Examples

			188033.65768912...

Crossrefs

Cf. A073449; A019987.

Programs

  • Maple
    evalf(cot(Pi/180)^3) ; # R. J. Mathar, Oct 03 2011
  • Mathematica
    RealDigits[Cot[1 Degree]^3,10,120][[1]] (* Harvey P. Dale, Nov 06 2019 *)

Extensions

Offset changed by Mohammad K. Azarian, Dec 13 2008

A113810 Decimal expansion of (cotangent of 1 degree)^4.

Original entry on oeis.org

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

Views

Author

Mohammad K. Azarian, Jan 22 2006

Keywords

Examples

			0.10772441034301..*10^8.

Crossrefs

Cf. A073449, A019987.

Extensions

Offset corrected by Mohammad K. Azarian, Dec 13 2008

A113811 Decimal expansion of (cotangent of 1 degree)^5.

Original entry on oeis.org

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

Views

Author

Mohammad K. Azarian, Jan 22 2006

Keywords

Examples

			617152733.52473559175633587342015158058...

Crossrefs

Cf. A019987, A073449.

Programs

Extensions

Offset corrected by Mohammad K. Azarian, Dec 13 2008

A113812 Decimal expansion of (cotangent of 1 degree)^(1/2).

Original entry on oeis.org

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

Views

Author

Mohammad K. Azarian, Jan 22 2006

Keywords

Crossrefs

Cf. A073449; A019987.

Programs

  • Mathematica
    RealDigits[Sqrt[Cot[1 Degree]],10,120][[1]] (* Harvey P. Dale, Feb 17 2020 *)

A113813 Decimal expansion of (cotangent of 1 degree)^(1/3).

Original entry on oeis.org

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

Views

Author

Mohammad K. Azarian, Jan 22 2006

Keywords

Crossrefs

Cf. A073449; A019987.

A113814 Decimal expansion of (cotangent of 1 degree)^(1/4).

Original entry on oeis.org

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

Views

Author

Mohammad K. Azarian, Jan 22 2006

Keywords

Crossrefs

Cf. A073449; A019987.

A113816 Decimal expansion of e^(cotangent of 1 degree).

Original entry on oeis.org

7, 5, 9, 8, 2, 6, 0, 9, 5, 1, 2, 3, 3, 1, 7, 0, 7, 5, 9, 0, 9, 2, 8, 8, 1, 9, 6, 0, 5, 6, 5, 4, 1, 1, 7, 2, 4, 7, 4, 6, 6, 2, 2, 3, 7, 4, 4, 0, 7, 9, 2, 5, 5, 5, 0, 4, 2, 3, 7, 0, 6, 7, 3, 1, 1, 9, 0, 2, 7, 6, 4, 0, 9, 2, 4, 8, 2, 8, 8, 2, 2, 7, 7, 6, 8, 5, 6, 9, 9, 6, 7, 1, 6, 1, 7, 9, 2, 3, 1, 7, 5, 5, 3, 6, 2
Offset: 25

Views

Author

Mohammad K. Azarian, Jan 22 2006

Keywords

Examples

			0.75982609512331707...*10^25

Crossrefs

Cf. A073449, A019987.

Programs

  • Maple
    exp(cot(Pi/180.0)) ; evalf(%) ;
  • Mathematica
    RealDigits[Exp[Cot[1 Degree]],10,120][[1]] (* Harvey P. Dale, Apr 07 2019 *)

Extensions

Offset corrected by Mohammad K. Azarian, Dec 13 2008
Showing 1-10 of 11 results. Next

Started in 1964 by Neil J. A. Sloane | Maintained by The OEIS Foundation Inc.

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