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%I #7 Mar 30 2012 18:57:01
%S 1,3,2,5,4,6,8,10,7,9,15,12,14,11,13,20,17,19,16,21,18,26,23,28,25,22,
%T 27,24,33,30,35,32,29,34,31,36,41,38,43,40,45,37,42,39,44,50,55,47,52,
%U 49,54,46,51,48,53,60,65,57,62,59,64,56,61
%N Permutation of N = set of natural numbers: a(n)+C(k,2), where a=A054065 and k=Floor((1+sqrt(8n-3))/2).
%H <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>
%e Referring to A054065, just add C(k,2) to the numbers in p(k): e.g. p(1)=(1)->(1); p(2)=(2,1)->(3,2); p(3)=(2,1,3)->(5,4,6).
%Y Inverse permutation: A054069.
%K nonn
%O 1,2
%A _Clark Kimberling_