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URL: https://oeis.org/history?seq=A392770

⇱ The On-Line Encyclopedia of Integer Sequences (OEIS)

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Showing entries 1-10 | older changes
a(n) is the smallest number not yet in the sequence that has an odd prime factor in common with a(n-2) and a prime factor (either 2 or odd) in common with a(n-1); a(1) = 3, a(2) = 6 (see comments for details).
#14 by Sean A. Irvine at Wed Feb 04 22:00:33 EST 2026
STATUS
#13 by Enrique Navarrete at Sat Jan 31 21:56:50 EST 2026
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#12 by Enrique Navarrete at Sat Jan 31 13:06:17 EST 2026
NAME
COMMENTS
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#11 by Enrique Navarrete at Mon Jan 26 15:55:38 EST 2026
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#10 by Enrique Navarrete at Mon Jan 26 15:55:05 EST 2026
NAME
#9 by Enrique Navarrete at Mon Jan 26 15:53:55 EST 2026
NAME
EXAMPLE
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#8 by Jason Yuen at Fri Jan 23 06:25:33 EST 2026
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#7 by Jason Yuen at Fri Jan 23 06:25:19 EST 2026
CROSSREFS
STATUS
#6 by Enrique Navarrete at Thu Jan 22 10:27:45 EST 2026
STATUS
#5 by Enrique Navarrete at Thu Jan 22 01:16:41 EST 2026
DATA
CROSSREFS