The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A125134 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A125134

"Brazilian" numbers ("les nombres brésiliens" in French): numbers n such that there is a natural number b with 1 < b < n-1 such that the representation of n in base b has all equal digits.
(history; published version)

#77 by Jon E. Schoenfield at Fri Nov 09 18:25:36 EST 2018

STATUS

editing

approved

#76 by Jon E. Schoenfield at Fri Nov 09 18:25:33 EST 2018

LINKS

9-th 9th Iberoamerican Mathematical Olympiad, <a href="http://imomath.com/othercomp/Ib/IbMO94.pdf">Problem 1: sensible numbers</a>, Fortaleza, Brazil, September 17-25, 1994.

STATUS

approved

editing

#75 by Joerg Arndt at Tue Aug 15 06:16:04 EDT 2017

STATUS

reviewed

approved

#74 by Jon E. Schoenfield at Sun Aug 13 13:31:33 EDT 2017

STATUS

proposed

reviewed

#73 by Jon E. Schoenfield at Sun Aug 13 13:31:29 EDT 2017

STATUS

editing

proposed

#72 by Jon E. Schoenfield at Sun Aug 13 13:31:22 EDT 2017

COMMENTS

Every even number >= 8 is Brazilian. Odd Brazilian numbers are in A257521. - Daniel Lignon, May 22 2015

STATUS

reviewed

editing

#71 by Joerg Arndt at Sun Aug 13 12:56:04 EDT 2017

STATUS

proposed

reviewed

#70 by Michel Marcus at Sun Aug 13 12:53:07 EDT 2017

STATUS

editing

proposed

#69 by Michel Marcus at Sun Aug 13 12:52:59 EDT 2017

REFERENCES

Iberoamerican Olympiads, 1994.

LINKS

9-th Iberoamerican Mathematical Olympiad, <a href="http://imomath.com/othercomp/Ib/IbMO94.pdf">Problem 1: sensible numbers</a>, Fortaleza, Brazil, September 17-25, 1994.

STATUS

approved

editing

#68 by Charles R Greathouse IV at Wed Aug 09 12:01:08 EDT 2017

STATUS

editing

approved