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!)
A269066 Five-digit primes whose first, third, and fifth digits are the same. 2
10111, 10141, 10151, 10181, 11131, 11161, 11171, 12101, 12161, 13121, 13151, 13171, 15101, 15121, 15131, 15161, 16111, 16141, 17191, 18121, 18131, 18181, 18191, 19121, 19141, 19181, 30313, 30323, 31333, 31393, 32303, 32323, 32353, 32363, 33343, 33353, 34303 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

There are 107 such primes.

LINKS

Harvey P. Dale, Table of n, a(n) for n = 1..107

EXAMPLE

13151 is a prime and its first, third, and fifth digits are the same.

MATHEMATICA

Select[Prime[Range[1230, 9592]], MatchQ[IntegerDigits[#], {x_, _, x_, _, x_}]&]

CROSSREFS

Cf. A269564

Sequence in context: A260247 A058042 A191244 * A161786 A157711 A159863

Adjacent sequences:  A269063 A269064 A269065 * A269067 A269068 A269069

KEYWORD

nonn,base,fini

AUTHOR

Harvey P. Dale, Feb 21 2016

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 May 15 01:50 EDT 2021. Contains 343909 sequences. (Running on oeis4.)