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Search: id:A069588
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| A069588 |
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Smallest prime in which the n-th significant digit is a 1. |
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+0
10
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| 11, 11, 101, 1009, 10007, 100003, 1000003, 10000019, 100000007, 1000000007, 10000000019, 100000000003, 1000000000039, 10000000000037, 100000000000031, 1000000000000037, 10000000000000061, 100000000000000003
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OFFSET
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1,1
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COMMENT
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Essentially (i.e., except for the initial term), the same as A003617. The definition is misleading, since "n-th significant digit" seems to mean here "most significant digit" (except for a(1)), while the "significance" is decreasing when going from the first to the last digit. (E.g., 1234 rounded to 2 significant digits is 1200, so "1,2" should be the first and second (and not fourth and third) significant digits.) [From M. F. Hasler (MHasler(AT)univ-ag.fr), Jun 03 2009]
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MAPLE
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11, seq(nextprime(10^j), j=1..30);
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CROSSREFS
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Sequence in context: A088772 A088771 A088773 this_sequence A088774 A131664 A110381
Adjacent sequences: A069585 A069586 A069587 this_sequence A069589 A069590 A069591
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KEYWORD
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nonn,base
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AUTHOR
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Amarnath Murthy (amarnath_murthy(AT)yahoo.com), Mar 25 2002
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EXTENSIONS
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More terms from Sascha Kurz (sascha.kurz(AT)uni-bayreuth.de), Mar 28 2002
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