id:A090535 - OEIS Search Results

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Least n-digit prime using digit 7 once and rest all 1, or 0 if no such prime exists.

+0
4

7, 17, 0, 1117, 11117, 0, 1111711, 11111117, 0, 1117111111, 17111111111, 0, 1111171111111, 0, 0, 0, 11111111111111171, 0, 1111111111111111171, 11111111111111117111, 0, 1111111111111111111711, 11111111111111111111117 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`a(3n) = 0.`
	EXAMPLE	`a(5) = 11117.`
	CROSSREFS	`Cf. A090536, A090537, A090538.` `Sequence in context: A029498 A129422 A101122 this_sequence A107778 A122735 A094464` `Adjacent sequences: A090532 A090533 A090534 this_sequence A090536 A090537 A090538`
	KEYWORD	`base,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Dec 08 2003`
	EXTENSIONS	`More terms from David Wasserman (wasserma(AT)spawar.navy.mil), Jan 03 2006`

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Last modified July 25 07:41 EDT 2008. Contains 142293 sequences.

AT&T Labs Research