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!)
A103119 Numbers n such that n0999 is prime. 0
7, 10, 23, 26, 29, 34, 41, 43, 47, 62, 73, 80, 89, 92, 97, 98, 100, 121, 124, 131, 142, 149, 155, 157, 173, 175, 181, 182, 191, 197, 202, 203, 218, 229, 230, 236, 241, 245, 250, 253, 262, 268, 272, 274, 275, 286, 289, 293, 295, 302, 311, 320, 323, 331, 335, 338 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

LINKS

Table of n, a(n) for n=1..56.

EXAMPLE

If n=7, then n0999 = 70999 (prime).

If n=41, then n0999 = 410999 (prime).

If n=80, then n0999 = 800999 (prime).

MATHEMATICA

fQ[n_] := PrimeQ[ FromDigits[ Join[ IntegerDigits[n], {0, 9, 9, 9}]]]; Select[ Range[ 349], fQ[ # ] &] (* Robert G. Wilson v, Mar 26 2005 *)

CROSSREFS

Cf. A104153.

Sequence in context: A097634 A120312 A074377 * A054224 A183330 A196316

Adjacent sequences:  A103116 A103117 A103118 * A103120 A103121 A103122

KEYWORD

base,nonn

AUTHOR

Parthasarathy Nambi, Mar 16 2005

EXTENSIONS

Edited and extended by Robert G. Wilson v, Mar 26 2005

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 September 22 15:04 EDT 2021. Contains 347607 sequences. (Running on oeis4.)