id:A032667 - OEIS Search Results

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Digit '4' concatenated with a(n) is a prime.

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1, 3, 7, 19, 21, 31, 33, 39, 43, 49, 57, 61, 63, 67, 79, 87, 91, 99, 111, 127, 129, 133, 139, 153, 157, 159, 177, 201, 211, 217, 219, 229, 231, 241, 243, 253, 259, 261, 271, 273, 283, 289, 297, 327, 337, 339, 349, 357, 363, 373, 391, 397, 409 (list; graph; listen)

	OFFSET	`0,2`
	CROSSREFS	`Adjacent sequences: A032664 A032665 A032666 this_sequence A032668 A032669 A032670` `Sequence in context: A083439 A032675 A089749 this_sequence A109991 A018432 A127925`
	KEYWORD	`nonn`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), May 15, 1998.`

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Last modified October 13 02:37 EDT 2008. Contains 145008 sequences.

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