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 A105979 #25 Sep 11 2023 09:11:29 %S A105979 557,5557,555557,55555553,55555559,5555555557,555555555551, %T A105979 555555555559,5555555555551,555555555555557,555555555555555559, %U A105979 5555555555555555555557,55555555555555555555555553,55555555555555555555555559,55555555555555555555555555555559 %N A105979 Near-repdigit primes with at least two 5's as the repeated digit. %H A105979 Robert Price, <a href="/A105979/b105979.txt">Table of n, a(n) for n = 1..25</a> %e A105979 5557 is a term because all digits are equal to 5 except one. %Y A105979 Cf. A105976, A105978, A105979, A105980, A105982, A365592, A365596, A365597, A365598. %K A105979 base,nonn %O A105979 1,1 %A A105979 _Shyam Sunder Gupta_, Apr 29 2005 %E A105979 Name clarified by _Robert Price_, Sep 10 2023