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A242063 Analog clock times where the minute hand is on the hour hand (in hhmm format). 0

%I #36 Feb 01 2015 16:50:04

%S 0,105,211,316,422,527,633,738,844,949,1055

%N Analog clock times where the minute hand is on the hour hand (in hhmm format).

%C The format is loosely defined - leading zeros of both hours and minutes disappear.

%C Changing the tolerance in the JavaScript program changes the results - try 0.01 for example, and we are allowed 10:54.

%C 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 Maths is Fun, <a href="http://www.mathsisfun.com/definitions/analog-clock-or-watch.html">Analog Clock</a>

%H Maths is Fun, <a href="http://www.mathsisfun.com/time-clocks-analog-digital.html">Set the time</a>

%H NAWCC, <a href="http://www.nawcc.org/index.php/just-for-kids/about-time/how-does-it-work">How do clocks work?</a>

%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Clock">Clocks</a>

%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Watch">Watches</a>

%F a(n) = a(n-1) + a(n-2) - a(n-3) for n=4..11. - _Colin Barker_, Aug 19 2014

%F a(n) = (-423 - (-1)^n + 422*n)/4 for n=1..11. - _Colin Barker_, Aug 19 2014

%e At 04:22 the minute hand covers the hour hand.

%o (JavaScript)

%o for (h=0;h<12;h++)

%o for (m=0;m<60;m++)

%o if (Math.abs(h/12+m/720-m/60)<0.007) {if (m<10) m="0"+m;document.write(h.toString()+m+", ");}

%Y Cf. A178181, A183032, A183033.

%K fini,full,nonn

%O 1,2

%A _Jon Perry_, Aug 13 2014

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Last modified September 15 03:00 EDT 2024. Contains 375931 sequences. (Running on oeis4.)