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A030284
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a(n) is the least prime > a(n-1) whose digits do not appear in a(n-1).
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7
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2, 3, 5, 7, 11, 23, 41, 53, 61, 73, 89, 101, 223, 401, 523, 601, 727, 809, 1117, 2003, 4111, 5003, 6121, 7039, 8111, 9007, 11113, 20029, 31147, 50069, 71143, 80209, 111143, 200009, 311111, 400009, 511111, 600043, 711121, 800053, 911111, 2000003, 4111147, 5000263, 7111199, 8000023, 9111161
(list; graph; refs; listen; history; internal format)
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OFFSET
| 1,1
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COMMENTS
| Sequence is infinite. - T. D. Noe, Jun 06 2007
a(n) may never have all of the 4 digits 1, 3, 7, 9: if a(n) has 3 of these digits then a(n+1) ends by the forth one. Pierre CAMI, May 06 2011
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LINKS
| T. D. Noe, Table of n, a(n) for n=1..500
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MATHEMATICA
| ta={1}; Do[s1=IntegerDigits[Part[ta, Length[ta]]]; s2=IntegerDigits[Prime[n]]; If[Equal[Intersection[s1, s2], {}], Print[{Prime[n], Prime[n+1]}]; ta=Append[ta, Prime[n]]], {n, 1, 1000000}]; ta=Delete[ta, 1] (Labos)
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CROSSREFS
| Sequence in context: A057459 A068853 A158217 * A068148 A036344 A165802
Adjacent sequences: A030281 A030282 A030283 * A030285 A030286 A030287
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KEYWORD
| nonn,base
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AUTHOR
| Patrick De Geest (pdg(AT)worldofnumbers.com)
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EXTENSIONS
| More terms from Labos E. (labos(AT)ana.sote.hu), Nov 18 2004
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