The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A144921

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Showing entries 1-10 | older changes

A144921

Duplicate of A002476.
(history; published version)

#13 by N. J. A. Sloane at Tue Jul 21 09:45:54 EDT 2020

STATUS

editing

approved

#12 by N. J. A. Sloane at Tue Jul 21 09:45:51 EDT 2020

COMMENTS

Previous name was: Prime numbers p such that |A144912(b, b^2)| = p for some even b.

Every prime is a member of this sequence, A144918, A144919, or A144920.

It is conjectured that for all even b there exists some k < 10 such that |A144912(b, b^2 + k)| is prime.

|A144912(b, b^2)| = |3*b - 5|, so this sequence is a duplicate of A002476. - Jinyuan Wang, Jul 21 2020

CROSSREFS

Cf. A144912, A144918, A144919, A144920

AUTHOR

Reikku Kulon, Sep 25 2008

STATUS

proposed

editing

#11 by Michel Marcus at Tue Jul 21 09:16:15 EDT 2020

STATUS

editing

proposed

#10 by Michel Marcus at Tue Jul 21 09:16:09 EDT 2020

COMMENTS

|A144912(b, b^2)| = |3*b - 5|, so this sequence is a duplicate of A002476.

|A144912(b, b^2)| = |3*b - 5|, so this sequence is a duplicate of A002476. - Jinyuan Wang, Jul 21 2020

STATUS

proposed

editing

#9 by Joerg Arndt at Tue Jul 21 08:45:22 EDT 2020

STATUS

editing

proposed

#8 by Joerg Arndt at Tue Jul 21 08:41:08 EDT 2020

NAME

Prime numbers p such that |A144912(b, b^2)| = p for some even b.

Duplicate of A002476.

COMMENTS

Previous name was: Prime numbers p such that |A144912(b, b^2)| = p for some even b.

STATUS

proposed

editing

#7 by Joerg Arndt at Tue Jul 21 08:36:37 EDT 2020

STATUS

editing

proposed

#6 by Joerg Arndt at Tue Jul 21 08:36:18 EDT 2020

COMMENTS

|A144912(b, b^2)| = |3*b - 5|, so this sequence is a duplicate of A002476.

|A144912(b, b^2)| = |3*b - 5|, this sequence is a duplicate of A002476.

CROSSREFS

Cf. A000040, A144912, A144918, A144919, A144920

KEYWORD

easy,nonn,changed

dead

Discussion

Tue Jul 21

08:36

Joerg Arndt: Sign comment saying this is a duplicate?

#5 by Joerg Arndt at Tue Jul 21 08:35:27 EDT 2020

COMMENTS

It is conjectured: that for all even b there exists some k < 10 such that |A144912(b, b^2 + k)| is prime.

- that for all even b there exists some k < 10 such that |A144912(b, b^2 + k)| is prime.

STATUS

proposed

editing

#4 by Jinyuan Wang at Tue Jul 21 08:05:10 EDT 2020

STATUS

editing

proposed