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%I #8 May 26 2017 14:56:10
%S 0,1,2,3,4,5,6,7,8,10,9,11,13,12,14,15,16,18,17,19,20,22,21,27,26,25,
%T 23,24,29,28,33,36,35,30,34,31,32,38,37,39,41,40,42,43,47,50,49,44,48,
%U 45,46,51,52,53,55,54,60,61,64,63,56,57,62,58,59,78,77,76,73,74,75,72
%N Permutation A069768 applied four times or permutation A073291 applied twice.
%H <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>
%F a(n) = A069768(A069768(A069768(A069768(n)))) = A073291(A073291(n)).
%Y Inverse permutation: A073294. Cf. A073290-A073299.
%K nonn
%O 0,3
%A _Antti Karttunen_, Jun 25 2002
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