id:A030670 - OEIS Search Results

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Smallest prime whose decimal expansion begins (nontrivially) with the n-th prime.

+0
4

23, 31, 53, 71, 113, 131, 173, 191, 233, 293, 311, 373, 419, 431, 479, 5323, 593, 613, 673, 719, 733, 797, 839, 8923, 971, 1013, 1031, 10711, 1091, 11311, 1277, 1319, 1373, 1399, 1493, 1511, 1571, 1637, 16729, 1733, 17911, 1811, 1913, 1931 (list; graph; listen)

	OFFSET	`1,1`
	COMMENT	`Add digits to p (starting with a nonzero digit) until reach another prime.`
	MATHEMATICA	`f[n_] := (k = 1; While[a = ToExpression[ ToString[n] <> ToString[k]]; ! PrimeQ[a], k++ ]; a); Table[ f[ Prime[n]], {n, 1, 45} ]`
	CROSSREFS	`See A064792 for another version. Note that A064792 <= a(n). Cf. A065112.` `Sequence in context: A054291 A052230 A064792 this_sequence A030680 A006203 A153635` `Adjacent sequences: A030667 A030668 A030669 this_sequence A030671 A030672 A030673`
	KEYWORD	`nonn,base`
	AUTHOR	`Patrick De Geest (pdg(AT)worldofnumbers.com)`

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Last modified December 6 11:04 EST 2009. Contains 170427 sequences.

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