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.

A094232 a(n) = 24 written in base n.

Original entry on oeis.org

111111111111111111111111, 11000, 220, 120, 44, 40, 33, 30, 26, 24, 22, 20
Offset: 1

Views

Author

N. J. A. Sloane, Jun 02 2004

Keywords

Comments

The next term involves a non-decimal number.
The term 111....1111 should officially be called the "unary expansion", since in base 1 only the digit 0 may appear.

References

  • Marilyn vos Savant, "Ask Marilyn," in 'Parade', Sunday, Apr 26 1999.

Crossrefs

Cf. A094203, A065147, etc.

A065004 100 written in base n, or -1 if the representation requires digits outside of 0 to 9.

Original entry on oeis.org

1111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111111, 1100100, 10201, 1210, 400, 244, 202, 144, 121, 100, 91, 84, 79, 72, -1, 64, -1, -1, 55, 50, -1, -1, 48, 44, 40, -1, -1, -1, -1, -1, 37, 34, 31, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 28, 26, 24, 22, 20, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 19, 18, 17, 16, 15, 14, 13, 12, 11, 10
Offset: 1

Views

Author

Bodo Zinser, Nov 19 2001

Keywords

Comments

The term 111....1111 should officially be called the "unary expansion", since in base 1 only the digit 0 may appear.
Terms exist for some bases up to 100. - T. D. Noe, Mar 09 2012

Crossrefs

Cf. A065147, A208090 (100 in base -n).

Programs

  • Mathematica
    Table[s = IntegerDigits[100, n]; If[Max[s] > 9, -1, FromDigits[s]], {n, 2, 100}] (* T. D. Noe, Mar 09 2012 *)

Extensions

Extended by T. D. Noe, Mar 09 2012
Title clarified by Sean A. Irvine, Aug 15 2021

A094203 a(n) = 24 written in base 13-n.

Original entry on oeis.org

20, 22, 24, 26, 30, 33, 40, 44, 120, 220, 11000, 111111111111111111111111
Offset: 1

Views

Author

N. J. A. Sloane, Jun 02 2004

Keywords

Comments

The term 111....1111 should officially be called the "unary expansion", since in base 1 only the digit 0 may appear.

References

  • Marilyn vos Savant, "Ask Marilyn," in 'Parade', Sunday, Apr 26 1999.

Crossrefs

Cf. A094232, A065147, etc.
Showing 1-3 of 3 results.

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

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