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!)
A201965 Primes of the form identical digits preceded by a 10. 1

%I #7 Mar 30 2012 18:38:28

%S 101,103,107,109,1033,10111,10333,101111,103333,107777,10333333,

%T 101111111,103333333,1033333333,10999999999,101111111111,

%U 1099999999999,10333333333333,101111111111111111,1099999999999999999,10333333333333333333

%N Primes of the form identical digits preceded by a 10.

%H Vincenzo Librandi, <a href="/A201965/b201965.txt">Table of n, a(n) for n = 1..37</a>

%t Select[FromDigits/@Flatten[Table[PadRight[{10},i,#]&/@{1,2,3,4,5,6,7,8,9},{i,2,200}],1],PrimeQ[#]&]

%K nonn,base,less

%O 1,1

%A _Vincenzo Librandi_, Dec 10 2011

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 25 07:53 EDT 2024. Contains 371964 sequences. (Running on oeis4.)