A280325 - OEIS

%I #25 Jan 02 2017 04:04:13

%S 261,-187,74,-38,36,-2,1,0

%N Deviations in hours between A280323 tropical years and A280324 synodic (lunar) months (rounded to nearest hour).

%C Values used for the average length of 1) the tropical year: 365.242190 ephemeris days; 2) the lunar month: 29.530589 ephemeris days.

%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Metonic_cycle">Cycle of Meton</a>

%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Lunar_month">Lunar month</a>

%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Lunisolar_calendar">Lunisolar calendar</a>

%H Wikipedia, <a href="https://en.wikipedia.org/wiki/Tropical_year">Tropical year</a>

%F a(n) = round(24*(365.242190 * A280323(n) - 29.530589 * A280324(n))).

%e Cycle of Meton: A280323(6) = 19 tropical years minus A280324(6) = 235 lunar months = -2.08 hours; a(6) = round(-2.08) = -2.

%Y Cf. A280323.

%K sign,fini,full

%O 1,1

%A _Jean-Christophe Hervé_, Dec 31 2016