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A030291
Primes with at most two different digits.
8
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
OFFSET
1,1
COMMENTS
The one-digit primes (2, 3, 5, 7) followed by the union of A004022 and A235154. - Jeppe Stig Nielsen, Feb 17 2021
LINKS
Jeppe Stig Nielsen, Table of n, a(n) for n = 1..21936 (first 1000 terms from T. D. Noe)
MATHEMATICA
Select[Range[1000], PrimeQ[#] && Length[Union[RealDigits[#][[1]]]] <= 2 &]
Select[Prime[Range[200]], Count[DigitCount[#], 0]>7&] (* Harvey P. Dale, Jul 14 2017 *)
CROSSREFS
KEYWORD
nonn,base,easy
EXTENSIONS
Offset corrected by Arkadiusz Wesolowski, Sep 13 2011
STATUS
approved