id:A096498 - OEIS Search Results

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Prime before n-th repunit.

+0
18

7, 109, 1109, 11093, 111109, 1111091, 11111101, 111111109, 1111111097, 11111111059, 111111111103, 1111111111093, 11111111111053, 111111111111053, 1111111111111039, 11111111111111107, 111111111111111091 (list; graph; listen)

	OFFSET	`2,1`
	FORMULA	`a(n) = A002275(n) - A096870(n) = A096497(n) - A096499(n).`
	MATHEMATICA	<<NumberTheory`NumberTheoryFunctions` Table[PreviousPrime[(10^n-1)/9], {n, 2, 40}]
	CROSSREFS	`Cf. A068693, A002275, A096497.` `Sequence in context: A137648 A106977 A142480 this_sequence A123804 A116875 A101924` `Adjacent sequences: A096495 A096496 A096497 this_sequence A096499 A096500 A096501`
	KEYWORD	`nonn`
	AUTHOR	`Labos E. (labos(AT)ana.sote.hu), Jul 09 2004`

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Last modified July 24 12:00 EDT 2008. Contains 142294 sequences.

AT&T Labs Research