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 A162238 #15 Jun 20 2023 14:19:34
%S A162238 2001,2007,2018,2024,2029,2035,2046,2052,2057,2063,2074,2080,2085,
%T A162238 2091,2103,2114,2120,2125,2131,2142,2148,2153,2159,2170,2176,2181,
%U A162238 2187,2198,2210,2216,2221,2227,2238,2244,2249,2255,2266,2272,2277,2283,2294,2300
%N A162238 Years in which January first falls on a Monday (since 2001).
%H A162238 <a href="/index/Ca#calendar">Index entries for sequences related to calendars</a>
%t A162238 Select[Range[2001,2300],DayName[{#,1,1}]==Monday&] (* _Harvey P. Dale_, Jun 20 2023 *)
%Y A162238 Cf. A116369.
%K A162238 nonn
%O A162238 1,1
%A A162238 _Claudio Meller_, Jun 28 2009