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!)
A032717 n prefixed by '9' and followed by '3' is a prime. 1

%I #15 Jan 16 2017 03:23:50

%S 5,8,10,13,17,20,28,29,32,34,40,41,43,46,47,53,61,62,64,73,74,80,83,

%T 88,92,97,103,115,116,118,119,124,125,128,130,137,139,142,143,145,146,

%U 149,151,157,158,167,170,173,175,181,182,187,194,200,203,208,214

%N n prefixed by '9' and followed by '3' is a prime.

%H Matthew House, <a href="/A032717/b032717.txt">Table of n, a(n) for n = 1..10000</a>

%e 953 is prime, so 5 is a term.

%t Select[Range[250],PrimeQ[FromDigits[Join[{9},IntegerDigits[#],{3}]]]&] (* _Harvey P. Dale_, Jul 30 2013 *)

%K nonn,base

%O 1,1

%A _Patrick De Geest_, May 15 1998

%E Offset corrected by _Matthew House_, Jan 15 2017

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

License Agreements, Terms of Use, Privacy Policy. .

Last modified April 23 05:37 EDT 2024. Contains 371906 sequences. (Running on oeis4.)