id:A032670 - OEIS Search Results

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Digit '7' concatenated with a(n) is a prime.

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1, 3, 9, 19, 27, 33, 39, 43, 51, 57, 61, 69, 73, 87, 97, 103, 109, 121, 127, 129, 151, 159, 177, 187, 193, 207, 211, 213, 219, 229, 237, 243, 247, 253, 283, 297, 307, 309, 321, 331, 333, 349, 351, 369, 393, 411, 417, 433, 451, 457, 459, 477, 481 (list; graph; listen)

	OFFSET	`0,2`
	CROSSREFS	`Sequence in context: A002091 A056259 A056682 this_sequence A068677 A069832 A057257` `Adjacent sequences: A032667 A032668 A032669 this_sequence A032671 A032672 A032673`
	KEYWORD	`nonn`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), May 15, 1998.`

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Last modified December 4 12:27 EST 2008. Contains 151280 sequences.

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