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!)
A167723 Squares that become prime numbers when prefixed with an 8. 1
9, 81, 2601, 3969, 4761, 6561, 25281, 31329, 35721, 56169, 59049, 68121, 71289, 91809, 131769, 149769, 168921, 194481, 199809, 210681, 221841, 263169, 301401, 335241, 370881, 423801, 439569, 463761, 480249, 576081, 603729, 613089, 622521 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
Subsequence of squares of A032671. - Michel Marcus, Jun 22 2016
LINKS
MATHEMATICA
Select[Range[1, 500000, 2]^2, PrimeQ[FromDigits[Join[{8}, IntegerDigits[#]]]] &] (* G. C. Greubel, Jun 21 2016 *)
CROSSREFS
Cf. A032671.
Sequence in context: A110853 A371640 A344402 * A203107 A168493 A003302
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 July 15 21:59 EDT 2024. Contains 374334 sequences. (Running on oeis4.)