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 1-3 of 3 results.

A004228 a(n) = 10000*log_10(n) rounded down.

Original entry on oeis.org

0, 3010, 4771, 6020, 6989, 7781, 8450, 9030, 9542, 10000, 10413, 10791, 11139, 11461, 11760, 12041, 12304, 12552, 12787, 13010, 13222, 13424, 13617, 13802, 13979, 14149, 14313, 14471, 14623
Offset: 1

Views

Author

N. J. A. Sloane

Keywords

Crossrefs

Cf. A004229, A004230.
Cf. A004216, A004219, A004222, A004225.

Programs

  • Mathematica
    Floor[10^4 Log[10,Range[30]]] (* Harvey P. Dale, Feb 07 2015 *)

A004234 a(n) = floor(10*log(n)).

Original entry on oeis.org

0, 6, 10, 13, 16, 17, 19, 20, 21, 23, 23, 24, 25, 26, 27, 27, 28, 28, 29, 29, 30, 30, 31, 31, 32, 32, 32, 33, 33, 34, 34, 34, 34, 35, 35, 35, 36, 36, 36, 36, 37, 37, 37, 37, 38, 38, 38, 38, 38, 39, 39, 39, 39, 39, 40, 40, 40, 40, 40, 40, 41, 41, 41, 41, 41, 41
Offset: 1

Views

Author

N. J. A. Sloane

Keywords

Examples

			a(2) = 6  because 10*log(2) =  6.9314718...
a(3) = 10 because 10*log(3) = 10.9861228...
a(4) = 13 because 10*log(4) = 13.8629436...

Links

Crossrefs

Cf. A004219.

Programs

  • Mathematica
    Table[Floor[10Log[n]], {n, 75}] (* Alonso del Arte, Dec 24 2013 *)

Extensions

More terms from Alonso del Arte, Dec 24 2013

A004225 a(n) = 1000*log_10(n) rounded down.

Original entry on oeis.org

0, 301, 477, 602, 698, 778, 845, 903, 954, 1000, 1041, 1079, 1113, 1146, 1176, 1204, 1230, 1255, 1278, 1301, 1322, 1342, 1361, 1380, 1397, 1414, 1431, 1447, 1462, 1477, 1491, 1505, 1518, 1531, 1544
Offset: 1

Views

Author

N. J. A. Sloane

Keywords

Crossrefs

Cf. A004226, A004227.
Cf. A004216, A004219, A004222, A004228.

Programs

  • Mathematica
    Floor[1000 Log10[Range[40]]] (* Harvey P. Dale, May 27 2024 *)
Showing 1-3 of 3 results.

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

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