%I #7 Mar 22 2022 00:11:48
%S 0,1,4,2,7,10,3,5,13,16,19,22,25,6,8,28,31,34,37,40,43,46,49,52,55,9,
%T 11,58,61,64,67,70,73,76,79,82,85,88,91,94,97,100,103,106,109,112,115,
%U 118,12,14,121,124,127,130,133,136,139,142,145,148,151,154
%N Inverse permutation to A078783.
%H Reinhard Zumkeller, <a href="/A257502/b257502.txt">Table of n, a(n) for n = 0..10000</a>
%o (Haskell)
%o import Data.List (elemIndex); import Data.Maybe (fromJust)
%o a257502 = fromJust . (`elemIndex` a078783_list)
%Y Cf. A078783.
%K nonn
%O 0,3
%A _Reinhard Zumkeller_, May 01 2015
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