login
This site is supported by donations to The OEIS Foundation.
Logo

Hints
(Greetings from The On-Line Encyclopedia of Integer Sequences!)
A030291 Primes with at most two different digits. 3
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101, 113, 131, 151, 181, 191, 199, 211, 223, 227, 229, 233, 277, 311, 313, 331, 337, 353, 373, 383, 433, 443, 449, 499, 557, 577, 599, 661, 677, 727, 733 (list; graph; refs; listen; history; internal format)
OFFSET

1,1

MATHEMATICA

Select[ Range[ 1, 1000 ], PrimeQ[ # ] && Length[ Union[ RealDigits[ # ][ [ 1 ] ] ] ] <= 2 & ]

CROSSREFS

Cf. A032758.

Sequence in context: A069675 A049585 A049549 * A052085 A082646 A038618

Adjacent sequences:  A030288 A030289 A030290 * A030292 A030293 A030294

KEYWORD

nonn,base,easy

AUTHOR

Patrick De Geest (pdg(AT)worldofnumbers.com)

EXTENSIONS

Offset corrected by Arkadiusz Wesolowski, Sep 13 2011

Lookup | Welcome | Wiki | Register | Music | Plot 2 | Demos | Index | Browse | More | WebCam
Contribute new seq. or comment | Format | Transforms | Puzzles | Hot | Classics
Recent Additions | More pages | Superseeker | Maintained by The OEIS Foundation Inc.

Content is available under The OEIS End-User License Agreement .

Last modified February 13 21:09 EST 2012. Contains 205561 sequences.