login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo


Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A069588 Smallest prime in which the n-th significant digit is a 1. 9
11, 11, 101, 1009, 10007, 100003, 1000003, 10000019, 100000007, 1000000007, 10000000019, 100000000003, 1000000000039, 10000000000037, 100000000000031, 1000000000000037, 10000000000000061, 100000000000000003 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

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, 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

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Style Sheet | Transforms | Superseeker | Recent
The OEIS Community | Maintained by The OEIS Foundation Inc.

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 3 15:51 EDT 2020. Contains 333197 sequences. (Running on oeis4.)