id:A093940 - OEIS Search Results

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Primes of the form 4*10^n + 7*R_n, where R_n is the repunit (A002275) of length n.

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47, 47777, 47777777777777, 47777777777777777777777777, 4777777777777777777777777777777777777 (list; graph; listen)

	OFFSET	`1,1`
	CROSSREFS	`Cf. A056708 (corresponding n).` `Sequence in context: A141797 A101629 A033520 this_sequence A087533 A023935 A002834` `Adjacent sequences: A093937 A093938 A093939 this_sequence A093941 A093942 A093943`
	KEYWORD	`nonn`
	AUTHOR	`Rick L. Shepherd (rshepherd2(AT)hotmail.com), Apr 17 2004`

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Last modified August 19 23:53 EDT 2008. Contains 142930 sequences.