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!)
A167742 Primes that becomes a square when some single digit is inserted in front of its decimal expansion. 1
5, 29, 41, 61, 89, 241, 281, 401, 409, 521, 569, 601, 761, 809, 929, 1009, 1289, 1609, 2441, 2801, 3001, 3361, 4289, 4649, 4969, 5281, 5849, 6481, 6569, 7121, 7841, 8081, 8209, 9049, 9241, 9601, 9929 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
LINKS
MATHEMATICA
sqQ[x_]:=Count[Table[FromDigits[Join[{n}, IntegerDigits[x]]], {n, 9}], _?(IntegerQ[Sqrt[#]]&)]>0; Select[Prime[Range[1300]], sqQ] (* Harvey P. Dale, Oct 24 2011 *)
CROSSREFS
Sequence in context: A087879 A091729 A033205 * A107151 A340154 A117746
KEYWORD
base,nonn
AUTHOR
Claudio Meller, Nov 10 2009
STATUS
approved

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 16 10:45 EDT 2024. Contains 371709 sequences. (Running on oeis4.)