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 A160342 #12 Jan 27 2023 08:10:47 %S A160342 199,223,2333,44449,555557,0,77767777,888888883,9199999999 %N A160342 Smallest near-repdigit prime with digit n occurring n times, or 0 if no such prime exists. %C A160342 "Near-repdigit" in the definition means that all but one of the digits of the base-10 representation are the same. %Y A160342 Cf. A105975-A105982, A069569, A164937 (near-repdigit primes). %K A160342 fini,full,nonn,base %O A160342 1,1 %A A160342 _Lekraj Beedassy_, May 10 2009 %E A160342 Corrected by _Arkadiusz Wesolowski_, Sep 23 2011