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!)
A024773 Every prefix and suffix prime in base 5 (written in base 5). 1
2, 3, 23, 32, 232 (list; graph; refs; listen; history; text; internal format)
OFFSET

1,1

COMMENTS

Primes that are both left-truncatable and right-truncatable in base 5.

LINKS

Table of n, a(n) for n=1..5.

EXAMPLE

The prime 67 is 232 in base 5. Truncating on the left, we obtain 32 (which is 17 in base 10) and 2, both of which are prime. Truncating on the right, we obtain 23 (which is 13 in base 10) and 2 again. Therefore 232 is in the sequence.

CROSSREFS

Sequence in context: A328940 A024764 A213971 * A176892 A109615 A101001

Adjacent sequences:  A024770 A024771 A024772 * A024774 A024775 A024776

KEYWORD

nonn,base,fini,full

AUTHOR

David W. Wilson

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 January 25 04:34 EST 2022. Contains 350565 sequences. (Running on oeis4.)