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.
?(! LetterQ[#] &)], "one"], DigitCount[#, 10, 1] == 0] &] (* _Michael De Vlieger's wiki page.
?(! LetterQ[#] &)], "one"], DigitCount[#, 10, 1] == 0] &] (* _Michael De Vlieger has authored 0 sequences.