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 21-23 of 23 results.

A155792 Decimal expansion of log_24(22).

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane, Oct 30 2009

Keywords

Examples

			0.97262117584078070061183271780887628500683372549612510321755...

Links

Crossrefs

Cf. decimal expansion of log_24(m): A152901 (m=2), A153100 (m=3), A153200 (m=4), A153458 (m=5), A153614 (m=6), A153736 (m=7), A154007 (m=8), A154116 (m=9), A154174 (m=10), A154195 (m=11), A154216 (m=12), A154461 (m=13), A154538 (m=14), A154735 (m=15), A154846 (m=16), A154904 (m=17), A154994 (m=18), A155168 (m=19), A155535 (m=20), A155692 (m=21), this sequence, A155920 (m=23).

Programs

  • Mathematica
    RealDigits[Log[24, 22], 10, 100][[1]] (* Vincenzo Librandi, Sep 10 2013 *)

A155920 Decimal expansion of log_24 (23).

Original entry on oeis.org

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

Views

Author

N. J. A. Sloane, Oct 30 2009

Keywords

Examples

			.98660827767850101591296991146999219224315792084615543323546...

Links

Crossrefs

Cf. decimal expansion of log_24(m): A152901 (m=2), A153100 (m=3), A153200 (m=4), A153458 (m=5), A153614 (m=6), A153736 (m=7), A154007 (m=8), A154116 (m=9), A154174 (m=10), A154195 (m=11), A154216 (m=12), A154461 (m=13), A154538 (m=14), A154735 (m=15), A154846 (m=16), A154904 (m=17), A154994 (m=18), A155168 (m=19), A155535 (m=20), A155692 (m=21), A155792 (m=22), this sequence.

Programs

  • Mathematica
    RealDigits[Log[24, 23], 10, 120][[1]] (* Harvey P. Dale, Jul 21 2012 *)

A152904 Triangle read by rows: T(n,k) = A008683(n-k+1); 1<=k<=n; mu(n) "decrescendo".

Original entry on oeis.org

1, -1, 1, -1, -1, 1, 0, -1, -1, 1, -1, 0, -1, -1, 1, 1, -1, 0, -1, -1, 1, -1, 1, -1, 0, -1, -1, 1, 0, -1, 1, -1, 0, -1, -1, 1, 0, 0, -1, 1, -1, 0, -1, -1, 1, 1, 0, 0, -1, 1, -1, 0, -1, -1, 1, -1, 1, 0, 0, -1, 1, -1, 0, -1, -1, 1
Offset: 1

Views

Author

Gary W. Adamson, Dec 14 2008

Keywords

Examples

			Triangle begins
   1;
  -1, 1;
  -1, -1, 1;
   0, -1, -1, 1;
  -1, 0, -1, -1, 1;
   1, -1, 0, -1, -1, 1;
  -1, 1, -1, 0, -1, -1, 1;
   0, -1, 1, -1, 0, -1, -1, 1;
   0, 0, -1, 1, -1, 0, -1, -1, 1;
   ...
Production matrix begins
  -1, 1,
  -2, 0, 1,
  -3, 0, 0, 1,
  -6, 0, 0, 0, 1,
  -9, 0, 0, 0, 0, 1,
  -17, 0, 0, 0, 0, 0, 1,
  -28, 0, 0, 0, 0, 0, 0, 1,
  -50, 0, 0, 0, 0, 0, 0, 0, 1,
  -83, 0, 0, 0, 0, 0, 0, 0, 0, 1,
  -147, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1 ...
  where first column is -A073776(n+1). - _Paul Barry_, Feb 10 2011

Links

  • E. Deutsch, L. Ferrari and S. Rinaldi, Production Matrices, Advances in Applied Mathematics, 34 (2005) pp. 101-122.

Crossrefs

Cf. A008683, A002321, A073776, A152901, A152902.
Row sums = A002321, the Mertens function. A185694 is an eigensequence.

Formula

Triangle read by rows, T(n,k) = A008683(n-k+1) = A008683 in every column = A008683 "decrescendo"d by rows.
Previous Showing 21-23 of 23 results.

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

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