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.

A152821 Decimal expansion of log_20 (2).

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane, Oct 30 2009

Keywords

Examples

			.23137821315975917426369770109764049589096550737356586183961...

Links

Crossrefs

Cf. decimal expansion of log_20(m): this sequence, A153035 (m=3), A153124 (m=4), A153454 (m=5), A153610 (m=6), A153630 (m=7), A153872 (m=8), A154019 (m=9), A154170 (m=10), A154191 (m=11), A154212 (m=12), A154433 (m=13), A154492 (m=14), A154705 (m=15), A154838 (m=16), A154900 (m=17), A154976 (m=18), A155115 (m=19), A155687 (m=21), A155789 (m=22), A155907 (m=23), A156015 (m=24).

Programs

Formula

Equals A002162 / A016643 = 1/A155172. - R. J. Mathar, Aug 13 2024

A153035 Decimal expansion of log_20 (3).

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane, Oct 30 2009

Keywords

Examples

			.36672579134208462891280714265933265359576843093233206828898...

Links

Crossrefs

Cf. decimal expansion of log_20(m): A152821 (m=2), this sequence, A153124 (m=4), A153454 (m=5), A153610 (m=6), A153630 (m=7), A153872 (m=8), A154019 (m=9), A154170 (m=10), A154191 (m=11), A154212 (m=12), A154433 (m=13), A154492 (m=14), A154705 (m=15), A154838 (m=16), A154900 (m=17), A154976 (m=18), A155115 (m=19), A155687 (m=21), A155789 (m=22), A155907 (m=23), A156015 (m=24).

Programs

  • Mathematica
    RealDigits[Log[20, 3], 10, 100][[1]] (* Vincenzo Librandi, Sep 05 2013 *)

Formula

Equals A002391 / A016643 . - R. J. Mathar, Aug 13 2024

A155172 Decimal expansion of log_2 (20).

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane, Oct 30 2009

Keywords

Comments

Equals 2 + A020858 = 1 + A020862 = A016643 / A002162. - Michel Marcus, Jul 28 2013

Examples

			4.3219280948873623478703194294893901758648313930245806120547...

Links

Crossrefs

Cf. decimal expansion of log_2(m): A020857 (m=3), A020858 (m=5), A020859 (m=6), A020860 (m=7), A020861 (m=9), A020862 (m=10), A020863 (m=11), A020864 (m=12), A152590 (m=13), A154462 (m=14), A154540 (m=15), A154847 (m=17), A154905 (m=18), A154995 (m=19), this sequence, A155536 (m=21), A155693 (m=22), A155793 (m=23), A155921 (m=24).

Programs

  • Mathematica
    RealDigits[Log[2, 20], 10, 100][[1]] (* Vincenzo Librandi, Aug 29 2013 *)

A016448 Continued fraction for log(20).

Original entry on oeis.org

2, 1, 233, 3, 6, 2, 1, 1, 2, 2, 2, 4, 8, 2, 2, 1, 27, 1, 6, 6, 2, 1, 4, 3, 1, 1, 1, 33, 2, 1, 2, 1, 1, 1, 3, 5, 3, 1, 3, 2, 2, 3, 7, 1, 2, 1, 4, 1, 5, 1, 2, 3, 4, 11, 2, 8, 2, 3, 5, 3, 1, 2, 1, 1, 2, 1, 5, 9, 1, 6, 7, 1, 6, 1, 3, 1, 47, 3, 1
Offset: 1

Views

Author

N. J. A. Sloane

Keywords

Examples

			2.9957322735539909934352235... = 2 + 1/(1 + 1/(233 + 1/(3 + 1/(6 + ...)))). - _Harry J. Smith_, May 17 2009

Links

Crossrefs

Cf. A016643 Decimal expansion. - Harry J. Smith, May 17 2009

Programs

  • Mathematica
    ContinuedFraction[Log[20], 100] (* Paolo Xausa, Mar 22 2024 *)
  • PARI
    { allocatemem(932245000); default(realprecision, 21000); x=contfrac(log(20)); for (n=1, 20000, write("b016448.txt", n, " ", x[n])); } \\ Harry J. Smith, May 17 2009
Showing 1-4 of 4 results.

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