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A111729 Historical progression of years from the song "In The Year 2525" by Denny Zager and Rick Evans. 0

%I #25 Sep 08 2023 22:51:41

%S 2525,3535,4545,5555,6565,7510,8510,9595,2525

%N Historical progression of years from the song "In The Year 2525" by Denny Zager and Rick Evans.

%C Sequence is potentially cyclic. #1 Billboard hit 1969. Last "2525" added because first verse repeats at the end. Note that it also begins to transition into the second verse again after this in some editions, causing "3535" to be faintly audible. The lyrics of the song also imply the sequence is theoretically cyclic and recurring, with the final 2525 being the beginning of the second iteration.

%H Wikipedia, <a href="http://en.wikipedia.org/wiki/Zager_and_Evans">Zager and Evans</a>.

%H Wikipedia, <a href="http://en.wikipedia.org/wiki/In_the_Year_2525">In The Year 2525</a>.

%H <a href="/index/So#songs">Index entries for sequences related to songs</a>

%F for n < 6 or n=8, a(n) = 101*(10n+15). For n=6 or 7, a(n) is irregular, and is equal to 101*(10n+15) with the exception that the final two digits are fixed at 10. Assuming the cyclic sequence, for n > 8, a(n) = f(n mod 8), with the exception that when n mod 8 = 0, take a(n) = n(8) = 9595.

%e The opening lyric is "In the year 2525/if man is still alive/if woman can survive/they may find..." hence a(1)=2525.

%K nonn,less

%O 1,1

%A Jeff Cohen (jcohen(AT)cpan.org), Nov 18 2005

%E a(9)=2525 and formula added by _Gregory Koch_, Mar 05 2011

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Last modified March 28 05:39 EDT 2024. Contains 371235 sequences. (Running on oeis4.)