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#22 by OEIS Server at Tue Jun 25 18:05:30 EDT 2024
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Robert Israel, <a href="/A155562/b155562_1.txt">Table of n, a(n) for n = 1..10000</a>
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#21 by Peter Luschny at Tue Jun 25 18:05:30 EDT 2024
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Discussion
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| Tue Jun 25
| 18:05
| OEIS Server: Installed first b-file as b155562.txt.
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#20 by Joerg Arndt at Tue Jun 25 10:06:43 EDT 2024
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#19 by Michel Marcus at Mon Jun 24 11:56:34 EDT 2024
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#18 by Michel Marcus at Mon Jun 24 11:56:25 EDT 2024
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Andrew D. Ionaşcu, <a href="httphttps://www.kurims.kyoto-u.acdoi.jp/EMIS/journals/ASUO/mathematics/anale2019vol2org/00_Ionascu10.pdf2478/auom-2019-0016">Intersecting semi-disks and the synergy of three quadratic forms</a>, An. Şt. Univ. Ovidius Constantą, (2019) Vol. 27, Issue 2, 5-13.
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proposed
editing
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Discussion
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| Mon Jun 24
| 11:56
| Michel Marcus: DOI link
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#17 by Robert Israel at Mon Jun 24 11:51:55 EDT 2024
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#16 by Robert Israel at Mon Jun 24 11:51:48 EDT 2024
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Numbers k such that in the prime factorization of k, all odd primes that occur with an odd exponent are congruent to 1 (mod 8). - Robert Israel, Jun 24 2024
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Robert Israel, <a href="/A155562/b155562_1.txt">Table of n, a(n) for n = 1..10000</a>
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approved
editing
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#15 by Alois P. Heinz at Mon Jun 27 18:28:34 EDT 2022
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#14 by Chai Wah Wu at Mon Jun 27 17:37:16 EDT 2022
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#13 by Chai Wah Wu at Mon Jun 27 17:37:11 EDT 2022
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(Python)
from itertools import count, islice
from sympy import factorint
def A155562_gen(): # generator of terms
return filter(lambda n:all((p & 3 != 3 and p & 7 < 5) or e & 1 == 0 for p, e in factorint(n).items()), count(0))
A155562_list = list(islice(A155562_gen(), 30)) # Chai Wah Wu, Jun 27 2022
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approved
editing
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