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 A242063 #36 Feb 01 2015 16:50:04 %S A242063 0,105,211,316,422,527,633,738,844,949,1055 %N A242063 Analog clock times where the minute hand is on the hour hand (in hhmm format). %C A242063 The format is loosely defined - leading zeros of both hours and minutes disappear. %C A242063 Changing the tolerance in the JavaScript program changes the results - try 0.01 for example, and we are allowed 10:54. %C A242063 It is debatable whether 00:00 should be 12:00, but I have used 00:00. As the clock is analog, 13:05 is not valid - am and pm is usually left to discretion. %H A242063 Maths is Fun, <a href="http://www.mathsisfun.com/definitions/analog-clock-or-watch.html">Analog Clock</a> %H A242063 Maths is Fun, <a href="http://www.mathsisfun.com/time-clocks-analog-digital.html">Set the time</a> %H A242063 NAWCC, <a href="http://www.nawcc.org/index.php/just-for-kids/about-time/how-does-it-work">How do clocks work?</a> %H A242063 Wikipedia, <a href="http://en.wikipedia.org/wiki/Clock">Clocks</a> %H A242063 Wikipedia, <a href="http://en.wikipedia.org/wiki/Watch">Watches</a> %F A242063 a(n) = a(n-1) + a(n-2) - a(n-3) for n=4..11. - _Colin Barker_, Aug 19 2014 %F A242063 a(n) = (-423 - (-1)^n + 422*n)/4 for n=1..11. - _Colin Barker_, Aug 19 2014 %e A242063 At 04:22 the minute hand covers the hour hand. %o A242063 (JavaScript) %o A242063 for (h=0;h<12;h++) %o A242063 for (m=0;m<60;m++) %o A242063 if (Math.abs(h/12+m/720-m/60)<0.007) {if (m<10) m="0"+m;document.write(h.toString()+m+", ");} %Y A242063 Cf. A178181, A183032, A183033. %K A242063 fini,full,nonn %O A242063 1,2 %A A242063 _Jon Perry_, Aug 13 2014