The On-Line Encyclopedia of Integer Sequences (OEIS)

Revision History for A147576

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Showing entries 1-10 | older changes

Numbers with exactly 3 distinct odd prime divisors {3,5,7}.
(history; published version)

#19 by Michel Marcus at Tue Dec 22 03:49:26 EST 2020

STATUS

reviewed

approved

#18 by Joerg Arndt at Tue Dec 22 02:17:05 EST 2020

STATUS

proposed

reviewed

#17 by Michel Marcus at Tue Dec 22 02:00:01 EST 2020

STATUS

editing

proposed

#16 by Michel Marcus at Tue Dec 22 01:59:58 EST 2020

CROSSREFS

STATUS

proposed

editing

#15 by Amiram Eldar at Tue Dec 22 01:24:32 EST 2020

STATUS

editing

proposed

#14 by Amiram Eldar at Tue Dec 22 01:20:27 EST 2020

COMMENTS

Numbers k such that phi(xk)/x k = m

#13 by Amiram Eldar at Tue Dec 22 01:18:27 EST 2020

COMMENTS

Successive numbers Numbers k such that EulerPhi[phi(x])/x = m

#12 by Amiram Eldar at Tue Dec 22 01:16:57 EST 2020

FORMULA

Sum_{n>=1} 1/a(n) = 1/48. - Amiram Eldar, Dec 22 2020

STATUS

approved

editing

#11 by OEIS Server at Tue Mar 10 10:25:08 EDT 2020

LINKS

Amiram Eldar, <a href="/A147576/b147576_1.txt">Table of n, a(n) for n = 1..10000</a> (terms 1..100 from Harvey P. Dale)

#10 by Susanna Cuyler at Tue Mar 10 10:25:08 EDT 2020

STATUS

proposed

approved

Discussion

Tue Mar 10

10:25

OEIS Server: Installed new b-file as b147576.txt.  Old b-file is now b147576_1.txt.