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Search: id:A101794
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| A101794 |
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Numbers n such that 4n-1, 8n-1, 16n-1 and 32n-1 are primes. |
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9
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| 45, 90, 675, 885, 3030, 4290, 6870, 13410, 14460, 15855, 17850, 18675, 20625, 21885, 25350, 26820, 26925, 28230, 30525, 30705, 31710, 31785, 33375, 34860, 41685, 41940, 57435, 63420, 63570, 71805, 74025, 78585, 83865, 85230, 93075
(list; graph; listen)
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OFFSET
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1,1
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EXAMPLE
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4*45-1=179, 8*45-1=359, 16*45-1=719 and 32*45-1=1439 are primes, so the first entry is 45.
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CROSSREFS
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Cf. A002515, A101795, A101796, A101797, A101798.
Sequence in context: A140380 A115827 A070002 this_sequence A124017 A121925 A044183
Adjacent sequences: A101791 A101792 A101793 this_sequence A101795 A101796 A101797
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KEYWORD
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easy,nonn
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AUTHOR
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Douglas Stones (dssto1(AT)student.monash.edu.au), Dec 16 2004
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