Prime numbers whose decimal expansion includes a substring of seven consecutive 7's.

Terms

a(0) =137777777a(1) =177777773a(2) =177777779a(3) =197777777a(4) =307777777a(5) =347777777a(6) =437777777a(7) =527777777a(8) =547777777a(9) =577777777a(10) =587777777a(11) =647777777a(12) =697777777a(13) =777777701a(14) =777777739a(15) =777777743a(16) =777777751a(17) =777777799a(18) =787777777a(19) =827777777a(20) =947777777a(21) =967777777a(22) =1247777777a(23) =1277777771a(24) =1277777773a(25) =1457777777a(26) =1487777777