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Search: id:A090661
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| A090661 |
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Numbers n such that prevprime(n!)-n*prevprime((n-1)!) < 0. |
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+0
2
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| 5, 8, 13, 15, 31, 34, 39, 95, 167, 325, 380, 470, 547
(list; graph; listen)
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OFFSET
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1,1
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MATHEMATICA
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PrevPrim[ n_ ] := Block[ {k = n - 1}, While[ !PrimeQ[ k ], k-- ]; k ]; Select[ Range[ 275 ], PrevPrim[ #! ] - #*PrevPrim[ (# - 1)! ] < 0 & ] (from Robert G. Wilson v)
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CROSSREFS
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Cf. A090660.
Adjacent sequences: A090658 A090659 A090660 this_sequence A090662 A090663 A090664
Sequence in context: A070127 A070128 A030606 this_sequence A047615 A140488 A058240
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KEYWORD
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nonn
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AUTHOR
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Mohammed Bouayoun (bouyao(AT)wanadoo.fr), Dec 15 2003
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EXTENSIONS
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More terms from Robert G. Wilson v (rgwv(AT)rgwv.com), Dec 20 2003
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