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⇱ The On-Line Encyclopedia of Integer Sequences (OEIS)

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Showing entries 1-10 | older changes
Numbers n such that (phi(n) + sigma(n))/(rad(n))^2 is an integer > 1 (phi=A000010, sigma=A000203, rad=A007947).
#22 by Joerg Arndt at Fri Dec 04 09:22:47 EST 2020
STATUS
#21 by Joerg Arndt at Fri Dec 04 09:22:40 EST 2020
MATHEMATICA
STATUS
#20 by Michel Marcus at Fri Dec 04 04:05:28 EST 2020
STATUS
#19 by Amiram Eldar at Fri Dec 04 03:45:15 EST 2020
STATUS
#18 by Amiram Eldar at Fri Dec 04 02:58:34 EST 2020
LINKS
#17 by Amiram Eldar at Fri Dec 04 02:57:54 EST 2020
MATHEMATICA
#16 by Amiram Eldar at Fri Dec 04 02:57:31 EST 2020
MATHEMATICA
#15 by Amiram Eldar at Fri Dec 04 02:56:52 EST 2020
CROSSREFS
#14 by Amiram Eldar at Fri Dec 04 02:56:07 EST 2020
MATHEMATICA
#13 by Amiram Eldar at Fri Dec 04 02:55:43 EST 2020
REFERENCES
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