login
This site is supported by donations to The OEIS Foundation.

 

Logo

Please make a donation to keep the OEIS running. We are now in our 55th year. In the past year we added 12000 new sequences and reached 8000 citations (which often say "discovered thanks to the OEIS"). We need to raise money to hire someone to manage submissions, which would reduce the load on our editors and speed up editing.
Other ways to donate

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A103888 Numbers n such that the string 100n001 is prime. 0
3, 8, 12, 21, 23, 38, 42, 45, 48, 51, 54, 56, 59, 69, 72, 83, 86, 92, 93, 105, 111, 113, 131, 135, 137, 159, 161, 162, 174, 176, 183, 203, 207, 209, 210, 228, 230, 237, 245, 246, 249, 260, 264, 267, 273, 287, 300, 324, 327, 330, 336, 341, 345, 362, 386, 390, 396 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..57.

EXAMPLE

If n=3, then 100n001 = 1003001 (prime).

If n=51, then 100n001 = 10051001 (prime).

If n=93, then 100n001 = 10093001 (prime).

CROSSREFS

Cf. A099678.

Sequence in context: A086813 A287081 A294482 * A014255 A022407 A169923

Adjacent sequences:  A103885 A103886 A103887 * A103889 A103890 A103891

KEYWORD

base,nonn,less

AUTHOR

Parthasarathy Nambi, Mar 30 2005

EXTENSIONS

More terms from David Wasserman, Apr 24 2008

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 December 10 23:18 EST 2019. Contains 329910 sequences. (Running on oeis4.)