id:A105322 - OEIS Search Results

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Primes of the form 8*10^n-7.

+0
3

73, 7993, 799993, 7999993, 79999999993, 7999999999993, 79999999999993, 7999999999999999999999999999999999999993, 7999999999999999999999999999999999999999999999993 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`This sequence is a subsequence of A104907 also is a subsequence of A105324(see A104907 and A105324).`
	FORMULA	`A105322=8*A099190-7.`
	EXAMPLE	`7993 is in the sequence because 7993=8*10^3-7 and 7993 is prime.`
	MATHEMATICA	`Do[If[PrimeQ[810^n - 7], Print[810^n - 7]], {n, 60}]`
	CROSSREFS	`Cf. A099190, A104907, A105324.` `Adjacent sequences: A105319 A105320 A105321 this_sequence A105323 A105324 A105325` `Sequence in context: A015260 A089788 A116241 this_sequence A091757 A070531 A076848`
	KEYWORD	`nonn`
	AUTHOR	`Farideh Firoozbakht (f.firoozbakht(AT)math.ui.ac.ir), Apr 16 2005`

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Last modified January 8 02:43 EST 2009. Contains 152824 sequences.

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