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Search: id:A133583
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| A133583 |
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Index of smallest prime number where n consecutive leading digits of the index match n consecutive leading digits in the prime. |
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+0
4
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OFFSET
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1,1
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COMMENT
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Puzzle 217 on Carlos Rivera's The Prime Puzzles & Problems Connection has anticipated some of the concepts of this sequence. Several people have contributed to this puzzle, and some of its terms may be seen there. In particular, the first page of the puzzle includes a term in this sequence.
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LINKS
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Carlos Rivera's The Prime Puzzles & Problems Connection, Puzzle 217
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EXAMPLE
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a(2)=5591 because this is the index of prime 55001 where n=2 and 55 in the index matches the first two leading digits of the prime.
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CROSSREFS
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Cf. A133584.
Adjacent sequences: A133580 A133581 A133582 this_sequence A133584 A133585 A133586
Sequence in context: A120904 A038596 A012014 this_sequence A012170 A052066 A069297
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KEYWORD
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easy,more,nonn,base
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AUTHOR
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Enoch Haga (Enokh(AT)comcast.net), Sep 17 2007, Sep 18 2007
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