The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A272897 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A272897

Largest prime factor of n-th taxi-cab number A001235(n).
(history; published version)

#22 by Bruno Berselli at Sat May 14 16:03:14 EDT 2016

STATUS

reviewed

approved

#21 by Michel Marcus at Sat May 14 13:29:52 EDT 2016

STATUS

proposed

reviewed

#20 by Michael De Vlieger at Tue May 10 12:23:42 EDT 2016

STATUS

editing

proposed

#19 by Michael De Vlieger at Tue May 10 12:23:38 EDT 2016

MATHEMATICA

FactorInteger[Select[Range[2*10^5], Length[PowersRepresentations[#, 2, 3]] > 1 &]][[All, -1, 1]] (* Michael De Vlieger, May 10 2016, after Harvey P. Dale at A001235 *)

STATUS

proposed

editing

#18 by Michel Marcus at Mon May 09 16:34:42 EDT 2016

STATUS

editing

proposed

#17 by Michel Marcus at Mon May 09 16:34:36 EDT 2016

COMMENTS

Is a(n) >= 13 for all n? This is true for n <= 10000. - Robert Israel, May 09 2016

STATUS

proposed

editing

#16 by Robert Israel at Mon May 09 15:31:47 EDT 2016

STATUS

editing

proposed

Discussion

Mon May 09

15:45

Altug Alkan: This question was the motivation of me. Prime factorization charactersitics of taxicab numbers. Thank you very much for b-file and question. Best regards.

#15 by Robert Israel at Mon May 09 15:31:32 EDT 2016

LINKS

Robert Israel, <a href="/A272897/b272897.txt">Table of n, a(n) for n = 1..10000</a>

#14 by Robert Israel at Mon May 09 15:29:07 EDT 2016

COMMENTS

Is a(n) >= 13 for all n? This is true for n <= 10000. - Robert Israel, May 09 2016

#13 by Robert Israel at Mon May 09 14:48:28 EDT 2016

NAME

Largest prime factor of n-th taxi-cab number A001235(n).

STATUS

proposed

editing

Discussion

Mon May 09

14:49

Robert Israel: Best to put A001235 in the Name to make it unambiguous?

14:50

Altug Alkan: Thanks, you are right. best regards.