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%I #15 Jun 22 2012 12:50:06
%S 1,8,7,9,13,17,37,86,157,326,941,2811,11878,56054,56053,232966,465926,
%T 6988755,25159587,75478749,880585235,2641755693,15850471389
%N Smallest number m such that A212813(m) = n.
%C A212813(a(n)) = n and A212813(m) < n for m < a(n).
%C a(22) <= 218727080602. - _Donovan Johnson_, Jun 02 2012
%o (Haskell)
%o import Data.List (elemIndex)
%o import Data.Maybe (fromJust)
%o a212911 = (+ 1) . fromJust . (`elemIndex` a212813_list)
%K nonn,more
%O -1,2
%A _Reinhard Zumkeller_, May 30 2012
%E a(17)-a(19) from _Donovan Johnson_, May 31 2012
%E a(20) from _Donovan Johnson_, Jun 02 2012
%E a(21) from _Hans Havermann_, Jun 22 2012
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