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A073921 Odd numbers which retain their position in the rearrangement of A073920: terms of A073920 for which a(n) = 2n-1. 1

%I #5 Dec 05 2013 19:55:33

%S 1,41,43,45,47

%N Odd numbers which retain their position in the rearrangement of A073920: terms of A073920 for which a(n) = 2n-1.

%C No further term below 21000000. Sequence is probably finite because the preferential placement of primes at earlier places than nonprimes in A073920 leads to 2 clearly separated branches in the plot of A073920 as a result of the prime number theorem. This leaves a void in between, in which the current sequence fails to find more points. - _R. J. Mathar_, Feb 13 2008

%F {2n-1: A073920(n)=2n-1}. - _R. J. Mathar_, Feb 13 2008

%Y Cf. A073920.

%K more,nonn

%O 1,2

%A _Amarnath Murthy_, Aug 19 2002

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Last modified May 6 17:57 EDT 2024. Contains 372297 sequences. (Running on oeis4.)