The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A245317

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

A245317

Concatenate n-th composite integer with n.
(history; published version)

#13 by Bruno Berselli at Thu Sep 18 09:39:47 EDT 2014

STATUS

proposed

approved

#12 by Jens Kruse Andersen at Thu Sep 18 09:32:54 EDT 2014

STATUS

editing

proposed

#11 by Jens Kruse Andersen at Thu Sep 18 09:32:44 EDT 2014

LINKS

Jens Kruse Andersen, <a href="/A245317/b245317.txt">Table of n, a(n) for n = 1..10000</a>

STATUS

approved

editing

#10 by N. J. A. Sloane at Wed Sep 17 20:59:07 EDT 2014

STATUS

proposed

approved

#9 by Jahangeer Kholdi at Wed Sep 17 19:05:46 EDT 2014

STATUS

editing

proposed

#8 by Jahangeer Kholdi at Wed Sep 17 19:04:44 EDT 2014

CROSSREFS

Cf. A002808, A245315, A245316, A246808.

STATUS

proposed

editing

#7 by Jahangeer Kholdi at Tue Sep 16 07:04:31 EDT 2014

STATUS

editing

proposed

Discussion

Wed Sep 17

18:45

Jahangeer Kholdi: See A246808 for one reason of interest. There will be more to come.

#6 by Jahangeer Kholdi at Tue Sep 16 07:03:36 EDT 2014

MATHEMATICA

w=Select[Range[2, 57], !PrimeQ[#]&]; Table[FromDigits[Flatten[{IntegerDigits[w[[n]]], IntegerDigits[n]}]], {n, 1, 40}]

STATUS

proposed

editing

Discussion

Tue Sep 16

07:04

Jahangeer Kholdi: A program was added.

#5 by Michel Marcus at Tue Sep 16 01:40:22 EDT 2014

STATUS

editing

proposed

Discussion

Tue Sep 16

03:01

Joerg Arndt: Why is this of interest?

#4 by Michel Marcus at Tue Sep 16 01:40:18 EDT 2014

NAME

Concatenate nth n-th composite integer with n.

CROSSREFS

Cf. A002808, A245315, A245316.

STATUS

proposed

editing