%I #13 Jan 31 2019 19:37:16
%S 1,2,3,5,6,4,12,8,9,20,17,24,33,13,22,11,69,37,51,7,14,88,109,23,67,
%T 49,232,40,107,25,91,16,97,119,26,53,290,153,41,21,350,39,253,208,56,
%U 112,669,28,270,614,30,76,667,388,95,43,464,675,671,32,796,92,45
%N Inverse to A306231.
%H <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>
%e A306231(39) = 42, hence a(42) = 39.
%Y Cf. A306231.
%K nonn,base
%O 1,2
%A _Rémy Sigrist_, Jan 31 2019