id:A050713 - OEIS Search Results

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Inserting a digit '3' between adjacent digits of n makes a prime.

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11, 17, 19, 23, 29, 31, 37, 41, 43, 49, 61, 73, 79, 89, 97, 103, 107, 131, 137, 139, 157, 163, 181, 191, 193, 209, 211, 233, 239, 241, 251, 257, 259, 263, 281, 283, 307, 331, 353, 367, 379, 391, 397, 407, 413, 427, 431, 463, 493, 521, 523, 529, 547, 563, 569 (list; graph; listen)

	OFFSET	`0,1`
	EXAMPLE	`E.g. 407 becomes 4(3)0(3)7 which is prime 43037.`
	CROSSREFS	`Cf. A050674, A050711-A050719.` `Sequence in context: A050891 A061751 A063449 this_sequence A038966 A050778 A049593` `Adjacent sequences: A050710 A050711 A050712 this_sequence A050714 A050715 A050716`
	KEYWORD	`nonn,base`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com), Aug 15 1999.`

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Last modified September 7 23:08 EDT 2008. Contains 143486 sequences.

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