The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A373145

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

A373145

a(n) = gcd(A003415(n), A276085(n)), where A003415 is the arithmetic derivative and A276085 is the primorial base log-function.
(history; published version)

#12 by Michael De Vlieger at Mon Jun 03 16:56:16 EDT 2024

STATUS

proposed

approved

#11 by Antti Karttunen at Mon Jun 03 16:41:13 EDT 2024

STATUS

editing

proposed

#10 by Antti Karttunen at Mon Jun 03 16:35:05 EDT 2024

CROSSREFS

Cf. A003415, A276086, A373144 (positions of multiples of 3), A373146, A373147, A373148.

Cf. A368998 (positions of even terms), A368999 (of odd terms), A373144 (of multiples of 3).

STATUS

approved

editing

#9 by Michael De Vlieger at Wed May 29 07:04:45 EDT 2024

STATUS

proposed

approved

#8 by Antti Karttunen at Wed May 29 02:48:03 EDT 2024

STATUS

editing

proposed

#7 by Antti Karttunen at Wed May 29 02:43:39 EDT 2024

FORMULA

For n > 1, a(n) = gcd(A276085(n), A373147(n)) = gcd(A003415(n), A373148(n)).

CROSSREFS

Cf. A003415, A276086, A373144 (positions of multiples of 3), A373146, A373147, A373148.

STATUS

approved

editing

#6 by OEIS Server at Sun May 26 18:42:30 EDT 2024

LINKS

Antti Karttunen, <a href="/A373145/b373145_1.txt">Table of n, a(n) for n = 1..65537</a>

#5 by Michael De Vlieger at Sun May 26 18:42:30 EDT 2024

STATUS

proposed

approved

Discussion

Sun May 26

18:42

OEIS Server: Installed first b-file as b373145.txt.

#4 by Antti Karttunen at Sun May 26 16:36:03 EDT 2024

STATUS

editing

proposed

#3 by Antti Karttunen at Sun May 26 16:32:12 EDT 2024

LINKS

Antti Karttunen, <a href="/A373145/b373145_1.txt">Table of n, a(n) for n = 1..65537</a>