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Revision History for A135177

(Bold, blue-underlined text is an addition; faded, red-underlined text is a deletion.)

Showing entries 1-10 | older changes
a(n) = p^2*(p-1), where p = prime(n).
(history; published version)
#54 by OEIS Server at Sat Dec 14 17:46:22 EST 2024
LINKS

Antti Karttunen, <a href="/A135177/b135177_1.txt">Table of n, a(n) for n = 1..10000</a> (first 1000 terms from Vincenzo Librandi)

#53 by Michael De Vlieger at Sat Dec 14 17:46:22 EST 2024
STATUS

reviewed

approved

Discussion
Sat Dec 14
17:46
OEIS Server: Installed new b-file as b135177.txt.  Old b-file is now b135177_1.txt.
#52 by Stefano Spezia at Sat Dec 14 16:18:17 EST 2024
STATUS

proposed

reviewed

#51 by Antti Karttunen at Sat Dec 14 14:43:50 EST 2024
STATUS

editing

proposed

#50 by Antti Karttunen at Sat Dec 14 14:43:31 EST 2024
PROG

(PARI) A135177(n) = ((p->(p-1)*p*p)(prime(n))); \\ Antti Karttunen, Dec 14 2024

#49 by Antti Karttunen at Sat Dec 14 14:40:39 EST 2024
CROSSREFS

Cf. A001248 (p^2), A030078 (p^3), A045991 (n^2 * (n-1)), A065414, A065483, A138416, A138459, (terms halved), A152441.

#48 by Antti Karttunen at Sat Dec 14 14:39:22 EST 2024
FORMULA

a(n) = 2*A138416(n). - Antti Karttunen, Dec 14 2024

CROSSREFS

Cf. A001248 (p^2), A030078 (p^3), A045991 (n^2 * (n-1)), A065414, A065483, A138416, A138459, A152441.

Cf. also A138416, A138459.

#47 by Antti Karttunen at Sat Dec 14 14:37:39 EST 2024
LINKS

Vincenzo Librandi, Antti Karttunen, <a href="/A135177/b135177_1.txt">Table of n, a(n) for n = 1..10000</a> (first 1000</a> terms from Vincenzo Librandi)

#46 by Antti Karttunen at Sat Dec 14 14:33:57 EST 2024
PROG

(PARI) A135177(n) = eulerphi(prime(n)^3); \\ Antti Karttunen, Dec 14 2024

CROSSREFS

Cf. also A138416, A138459.

Column 4 of A379010.

STATUS

approved

editing

#45 by Joerg Arndt at Tue Nov 22 02:34:15 EST 2022
STATUS

reviewed

approved