The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A064413 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A064413

EKG sequence (or ECG sequence): a(1) = 1; a(2) = 2; for n > 2, a(n) = smallest number not already used which shares a factor with a(n-1).
(history; published version)

#171 by Joerg Arndt at Thu Sep 28 02:06:47 EDT 2023

STATUS

reviewed

approved

#170 by Michel Marcus at Thu Sep 28 00:50:21 EDT 2023

STATUS

proposed

reviewed

#169 by Michael De Vlieger at Wed Sep 27 18:11:06 EDT 2023

STATUS

editing

proposed

#168 by Michael De Vlieger at Wed Sep 27 18:10:59 EDT 2023

LINKS

Michael De Vlieger, <a href="/A064413/a064413.txt">Table of n, a(n)</a> for n = 1..262144.

STATUS

proposed

editing

#167 by Michael De Vlieger at Wed Sep 27 18:09:01 EDT 2023

STATUS

editing

proposed

#166 by Michael De Vlieger at Wed Sep 27 18:08:15 EDT 2023

LINKS

Michael De Vlieger, <a href="/A064413/a064413.txt">Table of n, a(n)</a> for n = 1..262144.

STATUS

approved

editing

Discussion

Wed Sep 27

18:09

Michael De Vlieger: Extended b-file > 4 Mb added to facilitate investigation by others.

#165 by Michel Marcus at Sat Jan 14 03:12:00 EST 2023

STATUS

reviewed

approved

#164 by Joerg Arndt at Sat Jan 14 02:29:20 EST 2023

STATUS

proposed

reviewed

#163 by Michael De Vlieger at Fri Jan 13 19:10:42 EST 2023

STATUS

editing

proposed

#162 by Michael De Vlieger at Fri Jan 13 19:10:39 EST 2023

LINKS

N. J. A. Sloane, <a href="https://arxiv.org/abs/2301.03149">"A Handbook of Integer Sequences" Fifty Years Later</a>, arXiv:2301.03149 [math.NT], 2023, p. 16.

STATUS

approved

editing