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%I #17 May 31 2022 12:55:26
%S 0,1,2,3,5,4,25,7,20,21,13,6
%N a(n) is the index of A023394(n) in flattened array A050922.
%C a(14) = 26, a(15) = 16, a(16) = 27, a(20) = 17, a(22) = 28.
%C Permutation of the natural numbers.
%H Lorenzo Sauras-Altuzarra, <a href="https://doi.org/10.26493/2590-9770.1473.ec5">Some properties of the factors of Fermat numbers</a>, Art Discrete Appl. Math. (2022).
%H <a href="/index/Pri">Index entries for sequences that are related to primes dividing Fermat numbers</a>
%H <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>
%F A023394(n) = A050922(a(n)).
%e A023394(1) = 3 = A050922(0), so a(1) = 0.
%e A023394(2) = 5 = A050922(1), so a(2) = 1.
%Y Cf. A023394, A050922.
%K nonn,more
%O 1,3
%A _Lorenzo Sauras Altuzarra_, Apr 28 2021
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