The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A046053 (Bold, blue-underlined text is an addition; faded, red-underlined text is a ~~deletion~~.)
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A046053

Total number of prime factors of the repunit R(n) = (10^n-1)/9.
(history; published version)

#26 by Alois P. Heinz at Mon Aug 19 14:52:07 EDT 2024

STATUS

editing

approved

#25 by Alois P. Heinz at Mon Aug 19 14:52:05 EDT 2024

NAME

Total number of prime factors of the repunit R(n) = (10^n-1)/9.

STATUS

approved

editing

#24 by OEIS Server at Fri Apr 29 20:12:08 EDT 2022

LINKS

Max Alekseyev, <a href="/A046053/b046053_1.txt">Table of n, a(n) for n = 1..352</a> (first 322 terms from Ray Chandler)

#23 by Max Alekseyev at Fri Apr 29 20:12:08 EDT 2022

STATUS

editing

approved

Discussion

Fri Apr 29

20:12

OEIS Server: Installed new b-file as b046053.txt.  Old b-file is now b046053_1.txt.

#22 by Max Alekseyev at Fri Apr 29 20:11:05 EDT 2022

LINKS

Max Alekseyev, <a href="/A046053/b046053_1.txt">Table of n, a(n) for n = 1..352</a> (first 322 terms from Ray Chandler)

#21 by Max Alekseyev at Fri Apr 29 20:10:49 EDT 2022

LINKS

Ray Chandler, Max Alekseyev, <a href="/A046053/b046053_1.txt">Table of n, a(n) for n = 1..322352</a>

STATUS

approved

editing

#20 by Ray Chandler at Mon Apr 24 09:34:15 EDT 2017

STATUS

editing

approved

#19 by Ray Chandler at Mon Apr 24 09:34:04 EDT 2017

FORMULA

a(n) = A057951(n) - 2. - Ray Chandler, Apr 24 2017

CROSSREFS

Cf. A001222, A002275, A057951. For the number of distinct prime factors see A095370.

STATUS

approved

editing

#18 by N. J. A. Sloane at Sat Apr 22 13:02:11 EDT 2017

STATUS

proposed

approved

#17 by Ray Chandler at Sat Apr 22 12:55:58 EDT 2017

STATUS

editing

proposed