The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A037919 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
Showing entries 1-10 | older changes

A037919

Trajectory of 4 under prime factor concatenation procedure.
(history; published version)

#12 by N. J. A. Sloane at Wed Jun 15 13:15:47 EDT 2022

STATUS

editing

approved

#11 by N. J. A. Sloane at Wed Jun 15 13:15:04 EDT 2022

EXAMPLE

211. _- _N. J. A. Sloane_, Jun 15 2022

#10 by N. J. A. Sloane at Wed Jun 15 13:14:40 EDT 2022

EXAMPLE

May be regarded as the rows of an irregular triangle:

4

2 2

2 11

211. N. J. A. Sloane, Jun 15 2022

STATUS

proposed

editing

#9 by Michel Marcus at Tue Jun 14 12:01:33 EDT 2022

STATUS

editing

proposed

Discussion

Tue Jun 14

12:02

Michel Marcus: I don't see why tabf ?

12:09

Andrey Zabolotskiy: First row: 4 [= 2*2];
next row: 2 2 [reinterpreted as 22=2*11];
next row: 2 11 [reinterpreted as 211];
next row: 211 [prime].

12:10

Andrey Zabolotskiy: I really hope that Russ fixes https://github.com/oeis/oeis/issues/1 soon.

Wed Jun 15

13:13

N. J. A. Sloane: It IS confusing, so let's show the triangle.  I will do that

#8 by Michel Marcus at Tue Jun 14 12:01:16 EDT 2022

LINKS

P. Patrick De Geest, <a href="http://www.worldofnumbers.com/topic1.htm">Home Primes</a>

STATUS

proposed

editing

#7 by Andrey Zabolotskiy at Tue Jun 14 11:45:45 EDT 2022

STATUS

editing

proposed

Discussion

Tue Jun 14

11:48

Andrey Zabolotskiy: There are 21 sequences of the form "Trajectory of ... under prime factor concatenation procedure." with "tabl". If this is approved, I'll make this edit to each of them (and will approve it without proposing for review).

#6 by Andrey Zabolotskiy at Tue Jun 14 11:45:43 EDT 2022

KEYWORD

fini,full,nonn,tabl,tabf,base

STATUS

approved

editing

#5 by N. J. A. Sloane at Sun May 19 12:18:40 EDT 2013

AUTHOR

Jeff Burch (gburch(AT)erols.com)

Jeff Burch

Discussion

Sun May 19

12:18

OEIS Server: https://oeis.org/edit/global/1922

#4 by Russ Cox at Fri Mar 30 17:28:16 EDT 2012

EXTENSIONS

Edited by _Charles R Greathouse IV (charles.greathouse(AT)case.edu), _, Apr 30 2010

Discussion

Fri Mar 30

17:28

OEIS Server: https://oeis.org/edit/global/147

#3 by N. J. A. Sloane at Tue Jun 01 03:00:00 EDT 2010

KEYWORD

fini,full,nonn,tabl,base,new

EXTENSIONS

Edited by Charles R Greathouse IV (charles.greathouse(AT)case.edu), Apr 30 2010