The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A003666

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Showing entries 1-10 | older changes

A003666

a(n) is smallest number which is uniquely of the form a(j) + a(k) with 1 <= j < k < n and a(1) = 1, a(2) = 4.
(history; published version)

#39 by Sean A. Irvine at Sun Jun 28 15:47:49 EDT 2026

LINKS

Wikipedia, <a href="httphttps://en.wikipedia.org/wiki/Ulam_number">Ulam number</a>

Discussion

Sun Jun 28

15:47

OEIS Server: https://oeis.org/edit/global/3124

#38 by Amiram Eldar at Sat Nov 15 07:02:35 EST 2025

STATUS

reviewed

approved

#37 by Joerg Arndt at Sat Nov 15 06:06:34 EST 2025

STATUS

proposed

reviewed

#36 by Michel Marcus at Sat Nov 15 03:45:58 EST 2025

STATUS

editing

proposed

#35 by Michel Marcus at Sat Nov 15 03:45:55 EST 2025

LINKS

S. R. Finch, <a href="https://www.emisprojecteuclid.deorg/journals/EMexperimental-mathematics/volume-1/issue-1/Patterns-in-1-additive-sequences/em/1048709116.full">Patterns in 1-additive sequences</a>, Experimental Mathematics 1 (1992), 57-63.

STATUS

approved

editing

#34 by Sean A. Irvine at Sun Nov 02 13:55:57 EST 2025

LINKS

S. R. Finch, <a href="httphttps://www.emis.de/journals/EM/">Patterns in 1-additive sequences</a>, Experimental Mathematics 1 (1992), 57-63.

Discussion

Sun Nov 02

13:55

OEIS Server: https://oeis.org/edit/global/3055

#33 by Charles R Greathouse IV at Sun Feb 16 08:32:27 EST 2025

LINKS

Eric Weisstein's World of Mathematics, <a href="httphttps://mathworld.wolfram.com/UlamSequence.html">Ulam Sequence</a>

Discussion

Sun Feb 16

08:32

OEIS Server: https://oeis.org/edit/global/3014

#32 by Joerg Arndt at Mon Mar 13 08:41:10 EDT 2023

STATUS

reviewed

approved

#31 by Michel Marcus at Mon Mar 13 07:33:00 EDT 2023

STATUS

proposed

reviewed

#30 by David A. Corneth at Mon Mar 13 07:31:39 EDT 2023

STATUS

editing

proposed

Discussion

Mon Mar 13

07:32

David A. Corneth: and initial values

Showing entries 1-10 | older changes