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#20 by Harvey P. Dale at Sat Jul 27 16:13:34 EDT 2024
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#19 by Harvey P. Dale at Sat Jul 27 16:13:31 EDT 2024
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Select[Select[Mean/@Partition[Select[Range[2000], SquareFreeQ], 3, 1], #[[3]]-#[[2]]==#[[2]]-#[[1]]&][[;; , 2]], ], PrimeQ] (* Harvey P. Dale, Jul 27 2024 *)
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approved
editing
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#18 by Harvey P. Dale at Sat Jul 27 16:03:00 EDT 2024
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#17 by Harvey P. Dale at Sat Jul 27 16:02:58 EDT 2024
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Select[Select[Partition[Select[Range[2000], SquareFreeQ], 3, 1], #[[3]]-#[[2]]==#[[2]]-#[[1]]&][[;; , 2]], PrimeQ] (* Harvey P. Dale, Jul 27 2024 *)
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approved
editing
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#16 by Ralf Stephan at Tue Apr 29 02:03:12 EDT 2014
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#15 by Michel Marcus at Mon Apr 28 17:49:22 EDT 2014
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Discussion
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| Mon Apr 28
| 17:49
| Michel Marcus: Like A240476
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| Tue Apr 29
| 01:35
| Jon E. Schoenfield: I agree, 2 separate sentences is better. (I guess I was trying to improve the readability while minimizing the changing this time.)
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#14 by Michel Marcus at Mon Apr 28 17:49:14 EDT 2014
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#13 by Michel Marcus at Mon Apr 28 17:49:04 EDT 2014
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On the other hand, 29 is not a term because it is not midway between the closest flanking squarefree numbers 26 and 30.
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proposed
editing
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#12 by Chris Boyd at Mon Apr 28 14:35:33 EDT 2014
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Discussion
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| Mon Apr 28
| 15:23
| Michel Marcus: Thanks Chris.
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#11 by Chris Boyd at Mon Apr 28 14:35:15 EDT 2014
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| EXAMPLE
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19 is a term because it is midway between the closest flanking squarefree numbers 17 and 21; 29 is not a term because it is not midway between the closest flanking squarefree numbers 26 and 30.
29 is not a term because it is not midway between the closest flanking squarefree numbers 26 and 30.
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proposed
editing
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