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%I #19 May 13 2019 22:33:26
%S 0,1,4,2,164,19,3,5,16,14,12,10,8,6,8228,28,51,26,158,24,7,9,11,13,15,
%T 17,46,90,44,88,42,86,40,84,38,82,36,80,34,78,32,147,1975,18,22,20,
%U 255,73,1971,71,714,69,424,67,250,65,421,63,137,61,246,59,707
%N Left inverse of A274648
%C If A274648 is proved to be a permutation, then this is the full inverse of it.
%H Benjamin Chaffin, <a href="/A273148/b273148.txt">Table of n, a(n) for n = 0..153</a>
%H Benjamin Chaffin, <a href="/A273148/a273148.txt">Table of n, a(n) for n=0..1000000</a>. This represents the inverse of the first 3.2*10^11 terms of A274468. The 33242 entries of -1 correspond to values which have not yet appeared. The first missing number is 154. The largest term in this range is a(4287)=257890387560.
%F a(n) = index of n in A274648; for all n >= 0, a(A274648(n)) = n.
%e A274468(19) = 5, so a(5) = 19.
%Y Cf. A274648, A005132.
%K nonn
%O 0,3
%A _Benjamin Chaffin_, Oct 05 2016
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