login
The OEIS is supported by the many generous donors to the OEIS Foundation.

 

Logo
Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A032710 n prefixed by '1' and followed by '3' is a prime. 1

%I

%S 0,1,6,7,9,10,12,15,16,19,21,22,28,30,37,42,43,45,48,49,52,54,55,58,

%T 61,66,69,72,73,75,78,82,87,91,93,97,99,100,108,109,111,117,121,124,

%U 127,135,138,139,142,144,148,150,159,163,174,178,181,183,186,190,192

%N n prefixed by '1' and followed by '3' is a prime.

%H Harvey P. Dale, <a href="/A032710/b032710.txt">Table of n, a(n) for n = 0..1000</a>

%t Select[Range[0,200],PrimeQ[FromDigits[Join[{1},IntegerDigits[#],{3}]]]&] (* _Harvey P. Dale_, Dec 18 2012 *)

%K nonn,base

%O 0,3

%A _Patrick De Geest_, May 15 1998

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 January 18 06:55 EST 2022. Contains 350454 sequences. (Running on oeis4.)