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#14 by Alois P. Heinz at Fri Jun 28 03:25:38 EDT 2024
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#13 by Joerg Arndt at Fri Jun 28 01:34:46 EDT 2024
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#12 by Joerg Arndt at Fri Jun 28 01:34:42 EDT 2024
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#11 by Jon E. Schoenfield at Thu Jun 27 21:50:50 EDT 2024
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#10 by Jon E. Schoenfield at Thu Jun 27 21:50:07 EDT 2024
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| NAME
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Numbers nk such that 2^(2n2*k-1) mod (2n2*k+1) is prime.
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| STATUS
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approved
editing
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Discussion
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| Thu Jun 27
| 21:50
| Jon E. Schoenfield: Should the Formula entry just be deleted?
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#9 by Wesley Ivan Hurt at Sun Apr 17 20:58:26 EDT 2022
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#8 by Wesley Ivan Hurt at Sun Apr 17 20:58:23 EDT 2022
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| FORMULA
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A178970(a(n))=)) = A000040(k).
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| MATHEMATICA
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fQ[n_] := PrimeQ@ PowerMod[2, 2 n - 1, 2 n + 1]; Select[ Range@ 180, fQ]
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| STATUS
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approved
editing
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#7 by Russ Cox at Fri Mar 30 18:52:41 EDT 2012
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| AUTHOR
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_Juri-Stepan Gerasimov (2stepan(AT)rambler.ru), _, Jan 03 2011
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Discussion
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| Fri Mar 30
| 18:52
| OEIS Server: https://oeis.org/edit/global/257
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#6 by N. J. A. Sloane at Tue Jan 04 03:32:42 EST 2011
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#5 by Robert G. Wilson v at Mon Jan 03 20:18:35 EST 2011
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