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Revision History for A001481 (Underlined text is an addition; strikethrough text is a deletion.)

Showing entries 1-10 | older changes
A001481 Numbers that are the sum of 2 squares.
(history; published version)
#251 by Joerg Arndt at Tue Apr 16 01:39:50 EDT 2024
STATUS

reviewed

approved

#250 by Stefano Spezia at Tue Apr 16 00:46:51 EDT 2024
STATUS

proposed

reviewed

#249 by Michel Marcus at Tue Apr 16 00:42:56 EDT 2024
STATUS

editing

proposed

#248 by Michel Marcus at Tue Apr 16 00:42:49 EDT 2024
LINKS

Shuo Li, <a href="https://arxiv.org/abs/2404.08822">The characteristic sequence of the integers that are the sum of two squares is not morphic</a>, arXiv:2404.08822 [math.NT], 2024.

STATUS

approved

editing

#247 by Michael De Vlieger at Sat Mar 09 11:16:57 EST 2024
STATUS

reviewed

approved

#246 by Stefano Spezia at Sat Mar 09 11:13:44 EST 2024
STATUS

proposed

reviewed

#245 by Michael De Vlieger at Sat Mar 09 11:10:30 EST 2024
STATUS

editing

proposed

#244 by Michael De Vlieger at Sat Mar 09 11:10:28 EST 2024
LINKS

Leonor Godinho, Nicholas Lindsay, and Silvia Sabatini, <a href="https://arxiv.org/abs/2403.00949">On a symplectic generalization of a Hirzebruch problem</a>, arXiv:2403.00949 [math.SG], 2024. See p. 17.

STATUS

approved

editing

#243 by N. J. A. Sloane at Tue Oct 03 10:28:00 EDT 2023
STATUS

editing

approved

#242 by N. J. A. Sloane at Tue Oct 03 10:27:41 EDT 2023
COMMENTS

Any composite term of this sequence has at least one prime factor that is also in this sequence. This follows from Wilson's comment of 2004 and Adams-Watters's comment of 2011. - Alonso del Arte, Aug 12 2016. [No, not any composite term. The prime factors of 9, 49, 81, 121, ... are not in the sequence. - Klaus Purath, Sep 06 2023]

EXTENSIONS

Deleted an incorrect comment. - N. J. A. Sloane, Oct 03 2023

STATUS

proposed

editing

Discussion
Tue Oct 03 10:28
N. J. A. Sloane: I deleted the incorrect comment

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Last modified August 29 06:09 EDT 2024. Contains 375510 sequences. (Running on oeis4.)