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%I #7 Nov 19 2015 16:39:30
%S 0,2,3,4,4,5,5,9,5,11,6,13,6,7,16,6,18,7,20,7,22,23,24,7,26,27,9,29,7,
%T 8,32,33,34,8,10,37,38,8,40,41,42,43,44,8,46,47,48,49,9,51,52,53,8,12,
%U 56,57,58,59,9,61,62,63,64,9,13,67,68,69,70,71,72
%N Index of first row of triangle A103284 containing n.
%C a(n) <= n + 1.
%H Reinhard Zumkeller, <a href="/A257646/b257646.txt">Table of n, a(n) for n = 1..1000</a>
%o (Haskell)
%o import Data.List (findIndex); import Data.Maybe (fromJust)
%o a257646 n = fromJust $ findIndex (elem n) a103284_tabl
%Y Cf. A103284, A058084.
%K nonn
%O 1,2
%A _Reinhard Zumkeller_, Nov 19 2015
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