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
AUTHOR
EXTENSIONS
Offset corrected by Arkadiusz Wesolowski, Sep 13 2011
STATUS
approved