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Number of caesium clock "ticks" in time units: tick, second, minute, hour, day, week, month, year, decade, century, millennium, eon (in Julian years).
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%I #21 Sep 23 2024 11:33:57

%S 1,9192631770,551557906200,33093474372000,794243384928000,

%T 5559703694496000,24174783028746000,290097396344952000,

%U 2900973963449520000,29009739634495200000,290097396344952000000,290097396344952000000000000

%N Number of caesium clock "ticks" in time units: tick, second, minute, hour, day, week, month, year, decade, century, millennium, eon (in Julian years).

%C The standard SI second has been defined since 1968 as 9192631770 (A230458) transitions ("ticks") of the caesium-133 atom.

%C The values of a(7) to a(12) are based on the average Julian calendar year of 365.25 days, which appears frequently in astronomical publications, where it is usually called simply "Julian years".

%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Atomic_clock">Atomic clock</a>.

%F a(n) = A375666(n-1) * 9192631770, n>1.

%Y Cf. A053401, A375666 (similar sequences based on units of seconds).

%Y Cf. A213612, A213613, A213614 (use seconds in year).

%Y Cf. A230458 (value of a(2)).

%K easy,fini,nonn,full

%O 1,2

%A _Robert B Fowler_, Aug 31 2024