id:A101790 - OEIS Search Results

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Numbers n such that 4n-1, 8n-1 and 16n-1 are primes.

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7

3, 45, 90, 180, 255, 258, 363, 378, 453, 483, 615, 675, 705, 873, 885, 978, 1350, 1533, 1770, 1788, 2673, 2793, 2868, 3030, 3225, 3240, 4203, 4290, 4548, 4830, 4998, 5103, 5253, 5295, 5568, 5775, 5955, 6060, 6138, 6870, 7383, 7713, 8133 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`43-1=11, 83-1=23 and 16*3-1=47 are primes, so the first entry is 3.`
	CROSSREFS	`Cf. A002515, A101791, A101792, A101793.` `Sequence in context: A117960 A119182 A079038 this_sequence A124494 A075320 A071968` `Adjacent sequences: A101787 A101788 A101789 this_sequence A101791 A101792 A101793`
	KEYWORD	`easy,nonn`
	AUTHOR	`Douglas Stones (dssto1(AT)student.monash.edu.au), Dec 16 2004`

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Last modified November 30 22:12 EST 2008. Contains 150989 sequences.

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