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.
?(Mod[#, 10] == 1 &)], {n, 0, IntegerLength@ Max@ s}] ] (* _Michael De Vlieger's wiki page.
?(Mod[#, 10] == 1 &)], {n, 0, IntegerLength@ Max@ s}] ] (* _Michael De Vlieger has authored 0 sequences.