%I #4 Mar 30 2012 17:34:03
%S 0,2,1,6,3,5,4,12,7,11,8,10,9,20,13,19,14,18,15,17,16,30,21,29,22,28,
%T 23,27,24,26,25,42,31,41,32,40,33,39,34,38,35,37,36,56,43,55,44,54,45,
%U 53,46,52,47,51,48,50,49,72,57,71,58,70,59,69,60,68
%N Permutation of the natural numbers: 0 together with the partial sums of A171177.
%C a(n) is also the value of "x" and "y" of the n-th point (x,y), located on the infinite straight line (0,0),(1,1)..., that is intercepted by the path in structure of A171166.
%C For another version see A171175.
%H <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>
%Y Cf. A000027, A005132, A171164, A161165, A161166, A171172, A171173, A171174, A171175, A171176, A171178, A172310.
%K easy,nonn
%O 0,2
%A _Omar E. Pol_, Feb 23 2010