%I
%S 1,2,3,4,5,7,6,8,11,9,12,16,10,13,17,22,14,18,23,29,15,19,24,30,37,20,
%T 25,31,38,46,21,26,32,39,47,56,27,33,40,48,57,67,28,34,41,49,58,68,79,
%U 35,42,50,59,69,80,92,36,43,51,60,70,81,93,106,44,52,61,71,82,94,107
%N Permutation of the natural numbers.
%C Write the natural numbers as a triangle:
%C 1
%C 2...3
%C 4...5...6
%C 7...8...9..10
%C 11..12..13..14..15
%C Now read off the numbers diagonally from upperright to lowerleft. 1 > 2 > 3 > 4 > 5 > 7 > 6 > 8 > 11 > 9 > 12 > ...
%H Ivan Neretin, <a href="/A091995/b091995.txt">Table of n, a(n) for n = 1..10000</a>
%H <a href="/index/Per#IntegerPermutation">Index entries for sequences that are permutations of the natural numbers</a>
%Y a(n) = A090894(n1)+1. Cf. A092180.
%K easy,nonn
%O 1,2
%A Felix Tubiana (fat2(AT)columbia.edu), Mar 17 2004
