

A069588


Smallest prime in which the nth significant digit is a 1.


9



11, 11, 101, 1009, 10007, 100003, 1000003, 10000019, 100000007, 1000000007, 10000000019, 100000000003, 1000000000039, 10000000000037, 100000000000031, 1000000000000037, 10000000000000061, 100000000000000003
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OFFSET

1,1


COMMENTS

Essentially (i.e., except for the initial term), the same as A003617. The definition is misleading, since "nth 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, Jun 03 2009]


LINKS

Table of n, a(n) for n=1..18.


MAPLE

11, seq(nextprime(10^j), j=1..30);


CROSSREFS

Sequence in context: A088772 A088771 A088773 * A088774 A255745 A188548
Adjacent sequences: A069585 A069586 A069587 * A069589 A069590 A069591


KEYWORD

nonn,base


AUTHOR

Amarnath Murthy, Mar 25 2002


EXTENSIONS

More terms from Sascha Kurz, Mar 28 2002


STATUS

approved



