Primes with at least one digit appearing exactly four times in the decimal expansion.

Terms

a(0) =10111a(1) =11113a(2) =11117a(3) =11119a(4) =11131a(5) =11161a(6) =11171a(7) =11311a(8) =11411a(9) =16111a(10) =22229a(11) =23333a(12) =31333a(13) =33331a(14) =33343a(15) =33353a(16) =33533a(17) =38333a(18) =44449a(19) =47777a(20) =49999a(21) =59999a(22) =67777a(23) =71777a(24) =76777a(25) =77377a(26) =77477a(27) =77747a(28) =77773a(29) =77797