This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A168340 #9 Jan 27 2023 11:39:45 %S A168340 101111111111,111011111111,111111110111,111111111101, %T A168340 111110111111111111,111111111111011111,11011111111111111111, %U A168340 11111111111111111011,111111111111111111111101111111111111111111111111111111,111111111111111111111111111111101111111111111111111111 %N A168340 Near-repunit emirps with a single 0 in their decimal expansion. %C A168340 Emirps A006567 which are also "near" repunits (near indicating that one non-leading 1-digit is replaced by a 0). %F A168340 A065074 INTERSECT A006567. [_R. J. Mathar_, Nov 26 2009] %Y A168340 Cf. A065074. %K A168340 nonn,base %O A168340 1,1 %A A168340 _Lekraj Beedassy_, Nov 23 2009 %E A168340 6 more terms from _R. J. Mathar_, Nov 26 2009 %E A168340 Name changed by _Arkadiusz Wesolowski_, Sep 23 2011