id:A068164 - OEIS Search Results

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Smallest prime formed from n by inserting appropriate digits in it.

+0
6

11, 2, 3, 41, 5, 61, 7, 83, 19, 101, 11, 127, 13, 149, 151, 163, 17, 181, 19, 1201, 211, 223, 23, 241, 251, 263, 127, 281, 29, 307, 31, 1321, 233, 347, 353, 367, 37, 383, 139, 401, 41, 421, 43, 443, 457, 461, 47, 487, 149, 503, 151, 521, 53, 541, 557, 563, 157 (list; graph; listen)

	OFFSET	`1,1`
	EXAMPLE	`Smallest prime formed from 20 is 1201, by placing 1 on both sides. Smallest prime formed from 33 is 233, by placing a 2 in front.`
	CROSSREFS	`Cf. A018800, A060386. Similar to but different from A062584. E.g. a(133) = 1033, but A062584(133) = 4133.` `Adjacent sequences: A068161 A068162 A068163 this_sequence A068165 A068166 A068167` `Sequence in context: A088277 A089744 A107698 this_sequence A089754 A110743 A077549`
	KEYWORD	`base,easy,nonn`
	AUTHOR	`Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Feb 25 2002`
	EXTENSIONS	`Corrected by Ray Chandler (rayjchandler(AT)sbcglobal.net), Oct 11 2003`

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Last modified May 16 23:01 EDT 2008. Contains 139884 sequences.

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