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 1-4 of 4 results.

A152814 Decimal expansion of log_19 (2).

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane, Oct 30 2009

Keywords

Examples

			.23540891336663823644696546003684185383540677662781604728813...

Links

Crossrefs

Cf. decimal expansion of log_19(m): this sequence, A153027 (m=3), A153117 (m=4), A153451 (m=5), A153609 (m=6), A153629 (m=7), A153871 (m=8), A154018 (m=9), A154169 (m=10), A154190 (m=11), A154211 (m=12), A154401 (m=13), A154491 (m=14), A154697 (m=15), A154837 (m=16), A154899 (m=17), A154975 (m=18), A155531 (m=20), A155686 (m=21), A155787 (m=22), A155906 (m=23), A156000 (m=24).

Programs

Formula

Equals A002162 / A016642.

A155004 Decimal expansion of log_4 (19).

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane, Oct 30 2009

Keywords

Examples

			2.1239637567217927468967597114534172113467537848307670072907...

Links

Crossrefs

Cf. decimal expansion of log_4(m): A094148 (m=3), A153201 (m=5), A153460 (m=6), A153615 (m=7), A154155 (m=10), A154176 (m=11), A154197 (m=12), A154224 (m=13), A154464 (m=14), A154543 (m=15), A154849 (m=17), A154909 (m=18), this sequence, A155183 (m=20), A155545 (m=21), A155695 (m=22), A155818 (m=23), A155936 (m=24).
Cf. A016627, A016642.

Programs

A016447 Continued fraction for log(19).

Original entry on oeis.org

2, 1, 16, 1, 563, 1, 3, 1, 2, 1, 1, 7, 1, 2, 89, 1, 5, 2, 1, 31, 5, 3, 1, 1, 3, 1, 1, 31, 1, 1, 43, 1, 1, 14, 1, 1, 8, 2, 7, 2, 1, 2, 25, 1, 5, 165, 1, 4, 7, 1, 16, 1, 17, 1, 12, 29, 1, 1, 1, 1, 1, 6, 4, 1, 1, 1, 3, 1, 9, 5, 3, 3, 1, 1, 14, 2, 4, 1, 2, 2, 4, 1, 2, 1, 2, 4, 2, 1, 11, 2, 1, 1, 1, 2, 1, 3, 3
Offset: 1

Views

Author

N. J. A. Sloane

Keywords

Examples

			2.944438979166440460009027... = 2 + 1/(1 + 1/(16 + 1/(1 + 1/(563 + ...)))) \\ _Harry J. Smith_, May 17 2009

Links

Crossrefs

Cf. A016642 Decimal expansion. - Harry J. Smith, May 17 2009

Programs

  • Mathematica
    ContinuedFraction[Log[19], 100] (* Stefan Steinerberger, Apr 11 2006 *)
  • PARI
    { allocatemem(932245000); default(realprecision, 21000); x=contfrac(log(19)); for (n=1, 20000, write("b016447.txt", n, " ", x[n])); } \\ Harry J. Smith, May 17 2009

A016680 Decimal expansion of log(57).

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane

Keywords

Examples

			4.04305126783455015140427266881037924188486981912187827027265457004....

References

  • M. Abramowitz and I. A. Stegun, eds., Handbook of Mathematical Functions, National Bureau of Standards Applied Math. Series 55, 1964 (and various reprintings), p. 2.

Links

Crossrefs

Cf. A016485 (continued fraction).
Equals A002391 + A016642.

Programs

  • Maple
    evalf(log(57), 100); # Wesley Ivan Hurt, Jan 28 2017
  • Mathematica
    RealDigits[Log[57], 10, 120][[1]] (* Vincenzo Librandi, Jun 21 2015 *)
  • PARI
    default(realprecision, 20080); x=log(57); for (n=1, 20000, d=floor(x); x=(x-d)*10; write("b016680.txt", n, " ", d)); \\ Harry J. Smith, May 22 2009

Formula

Equals A002391 + A016642. - R. J. Mathar, Jul 22 2025
Showing 1-4 of 4 results.

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

Content is available under The OEIS End-User License Agreement.