The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A366632

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

A366632

Number of distinct prime divisors of 7^n - 1.
(history; published version)

#13 by OEIS Server at Sat Jan 20 12:10:15 EST 2024

LINKS

Max Alekseyev, <a href="/A366632/b366632_1.txt">Table of n, a(n) for n = 1..388</a>

#12 by Max Alekseyev at Sat Jan 20 12:10:15 EST 2024

STATUS

proposed

approved

Discussion

Sat Jan 20

12:10

OEIS Server: Installed first b-file as b366632.txt.

#11 by Max Alekseyev at Sat Jan 20 12:09:58 EST 2024

STATUS

editing

proposed

#10 by Max Alekseyev at Sat Jan 20 12:09:53 EST 2024

LINKS

Max Alekseyev, <a href="/A366632/b366632_1.txt">Table of n, a(n) for n = 1..388</a>

CROSSREFS

Cf. A024075, A001221, A057954, A059889, A074249, A218358, A366620, A366633, A366634, A366635.

Cf. A046800, A133801, A366604, A366611, A366620, A366651, A366660, A102347, A366681, A366707.

STATUS

approved

editing

#9 by Michel Marcus at Sun Oct 15 05:18:27 EDT 2023

STATUS

reviewed

approved

#8 by Joerg Arndt at Sun Oct 15 03:41:50 EDT 2023

STATUS

proposed

reviewed

#7 by Joerg Arndt at Sun Oct 15 03:41:38 EDT 2023

STATUS

editing

proposed

#6 by Joerg Arndt at Sun Oct 15 03:41:36 EDT 2023

FORMULA

a(n) = omega(7^n-1) = A001221(A024075(n)).

STATUS

reviewed

editing

#5 by Joerg Arndt at Sun Oct 15 03:41:24 EDT 2023

STATUS

proposed

reviewed

#4 by Sean A. Irvine at Sun Oct 15 00:01:46 EDT 2023

STATUS

editing

proposed