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A161796 Primes with at least one digit appearing exactly five times in the decimal expansion. 2
101111, 111119, 111121, 111191, 111211, 111611, 112111, 113111, 131111, 199999, 311111, 313333, 323333, 331333, 333233, 333323, 333331, 333337, 333383, 333433, 333533, 334333, 343333, 353333, 444443, 444449, 511111, 555557, 599999, 611111 (list; graph; refs; listen; history; text; internal format)
OFFSET
1,1
COMMENTS
The sequence is probably infinite.
LINKS
MAPLE
isdgctm := proc(n, d) local dgs, a, i ; dgs := convert(n, base, 10) ; a := [seq(0, j=0..9)] ;
for i in dgs do a := subsop(i+1=op(i+1, a)+1, a) ; od: if convert(a, set) intersect {d} <> {} then true; else false; fi; end:
for n from 1 to 100000 do p := ithprime(n) ; if isdgctm(p, 5) then printf("%d, ", p) ; fi; od: # R. J. Mathar, Jun 21 2009
CROSSREFS
Sequence in context: A115828 A168529 A255976 * A096929 A031678 A354566
KEYWORD
nonn,base
AUTHOR
Ki Punches, Jun 19 2009
EXTENSIONS
Edited and corrected by R. J. Mathar, Jun 21 2009
STATUS
approved

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Last modified July 25 00:10 EDT 2024. Contains 374585 sequences. (Running on oeis4.)