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A101994
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Numbers n such that 4n-1, 8n-1, 16n-1, 32n-1 and 64n-1 are primes.
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7
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45, 13410, 15855, 31710, 31785, 63570, 74025, 85230, 151830, 202635, 267300, 280665, 399675, 405405, 455250, 466560, 478170, 480240, 511335, 534600, 539475, 561330, 569520, 589305, 666945, 716460, 743160, 748215, 766785, 799350, 860835
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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EXAMPLE
| 4*45-1=179, 8*45-1=359, 16*45-1=719, 32*45-1=1439 and 64*45-1=2879 are primes, so the first entry is 45.
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CROSSREFS
| Cf. A002515, A101790, A101794. Cf. A101995, A101996, A101997, A101998, A101999.
Sequence in context: A199355 A163035 A184136 * A201004 A171118 A199521
Adjacent sequences: A101991 A101992 A101993 * A101995 A101996 A101997
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KEYWORD
| easy,nonn
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AUTHOR
| Douglas Stones (dssto1(AT)student.monash.edu.au), Dec 23 2004
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