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URL: https://oeis.org/A228420

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A228420
Count of the first 10^n primes which do not contain the digit 8.
0
1, 10, 92, 816, 6712, 60867, 555878, 5026796, 43410238, 395243878, 3576361255, 32461990759, 282971130960
OFFSET
1,2
FORMULA
a(n) <= 9^n. - Charles R Greathouse IV, May 21 2014
EXAMPLE
a(1) = 10 since there are 10 primes in the first 10 (through 29) that do not contain a 8. Namely: 2, 3, 5, 7, 11, 13, 17, 19, 23, 29.
MATHEMATICA
Table[Length[Select[Range[10^n], DigitCount[Prime[#], 10, 8] == 0 &]], {n, 0, 5}] (* Robert Price, Mar 23 2020 *)
KEYWORD
more,nonn,base,hard
AUTHOR
Robert Price, Nov 09 2013
EXTENSIONS
a(12) from Lucas A. Brown, Mar 19 2024
STATUS
approved