id:A050711 - OEIS Search Results

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Inserting a digit '1' between adjacent digits of n makes a prime.

+0
10

13, 21, 31, 33, 37, 49, 63, 67, 69, 79, 81, 91, 99, 113, 117, 119, 123, 131, 137, 141, 159, 167, 177, 179, 183, 201, 203, 207, 209, 221, 233, 237, 239, 249, 257, 261, 263, 267, 273, 287, 291, 303, 309, 329, 339, 351, 353, 357, 387, 401, 407, 413, 417, 423 (list; graph; listen)

	OFFSET	`0,1`
	EXAMPLE	`E.g. 303 becomes 3(1)0(1)3 which is prime 31013.`
	CROSSREFS	`Cf. A050674, A050711-A050719.` `Sequence in context: A087683 A128819 A165955 this_sequence A020440 A164458 A164452` `Adjacent sequences: A050708 A050709 A050710 this_sequence A050712 A050713 A050714`
	KEYWORD	`nonn,base`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Aug 15 1999.`

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Last modified November 24 14:25 EST 2009. Contains 167438 sequences.

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