The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A031432 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A031432

Least term in period of continued fraction for sqrt(n) is 8.
(history; published version)

#19 by OEIS Server at Mon Aug 07 12:00:07 EDT 2017

LINKS

Charles R Greathouse IV, <a href="/A031432/b031432_1.txt">Table of n, a(n) for n = 1..10000</a> (first 200 from Vincenzo Librandi)

#18 by Charles R Greathouse IV at Mon Aug 07 12:00:07 EDT 2017

STATUS

editing

approved

Discussion

Mon Aug 07

12:00

OEIS Server: Installed new b-file as b031432.txt.  Old b-file is now b031432_1.txt.

#17 by Charles R Greathouse IV at Mon Aug 07 12:00:04 EDT 2017

LINKS

Vincenzo Librandi, Charles R Greathouse IV, <a href="/A031432/b031432_1.txt">Table of n, a(n) for n = 1..10000</a> (first 200</a> from Vincenzo Librandi)

STATUS

approved

editing

#16 by Giovanni Resta at Mon Jun 20 05:58:08 EDT 2016

STATUS

reviewed

approved

#15 by Joerg Arndt at Mon Jun 20 05:56:02 EDT 2016

STATUS

proposed

reviewed

#14 by Michel Marcus at Mon Jun 20 01:55:07 EDT 2016

STATUS

editing

proposed

#13 by Michel Marcus at Mon Jun 20 01:55:02 EDT 2016

MATHEMATICA

Select[Range[20000], !IntegerQ[Sqrt[#]] && Min[ContinuedFraction[Sqrt[#]][[2]]] == 8&] (* _Vincenzo Librandi, _, Feb 07 2012 *)

STATUS

proposed

editing

#12 by Chai Wah Wu at Sun Jun 19 21:53:46 EDT 2016

STATUS

editing

proposed

#11 by Chai Wah Wu at Sun Jun 19 21:32:34 EDT 2016

COMMENTS

16*m^2 + m for m >= 1 are terms of this sequence (see comment in A031742). The first term that is not of this form is a(11) = 1690. - Chai Wah Wu, Jun 19 2016

#10 by Chai Wah Wu at Sun Jun 19 21:22:06 EDT 2016

COMMENTS

16*m^2 + m for m >= 1 are terms of this sequence. The first term that is not of this form is a(11) = 1690. - Chai Wah Wu, Jun 19 2016

STATUS

approved

editing