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%I #5 Mar 30 2012 18:51:00

%S 0,1,4,2,3,7,8,9,5,6,12,13,14,15,16,10,11,19,20,21,22,23,24,25,17,18,

%T 28,29,30,31,32,33,34,35,36,26,27,39,40,41,42,43,44,45,46,47,48,49,37,

%U 38,52,53,54,55,56,57,58,59,60,61,62,63,64,50,51,67,68,69,70,71,72,73,74

%N A143052(A143052(n)).

%C Permutation of the natural numbers, inverse: A143053;

%C For n>1: a(A008865(n))=A000290(n),

%C a(A000290(n))=A000290(n)-A005408(n-2).

%H <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>

%K nonn

%O 0,3

%A _Reinhard Zumkeller_, Jul 20 2008