login
The OEIS Foundation is supported by donations from users of the OEIS and by a grant from the Simons Foundation.

 

Logo

Year-end appeal: Please make a donation to the OEIS Foundation to support ongoing development and maintenance of the OEIS. We are now in our 56th year, we are closing in on 350,000 sequences, and we’ve crossed 9,700 citations (which often say “discovered thanks to the OEIS”).

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A032710 n prefixed by '1' and followed by '3' is a prime. 1
0, 1, 6, 7, 9, 10, 12, 15, 16, 19, 21, 22, 28, 30, 37, 42, 43, 45, 48, 49, 52, 54, 55, 58, 61, 66, 69, 72, 73, 75, 78, 82, 87, 91, 93, 97, 99, 100, 108, 109, 111, 117, 121, 124, 127, 135, 138, 139, 142, 144, 148, 150, 159, 163, 174, 178, 181, 183, 186, 190, 192 (list; graph; refs; listen; history; text; internal format)
OFFSET

0,3

LINKS

Harvey P. Dale, Table of n, a(n) for n = 0..1000

MATHEMATICA

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

CROSSREFS

Sequence in context: A248178 A284094 A120183 * A188055 A287347 A216361

Adjacent sequences:  A032707 A032708 A032709 * A032711 A032712 A032713

KEYWORD

nonn,base

AUTHOR

Patrick De Geest, May 15 1998

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 December 3 05:05 EST 2021. Contains 349445 sequences. (Running on oeis4.)