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%I #4 Dec 05 2013 19:56:33
%S 2,3,3,7,4,9,6,11,8,5,4,3,12,13,5,32,17,8,18,19,6,5,13,5,13,5,13,5,13,
%T 5,13,5,13,5,13,5,13,5,13,5,13,5,13,5,13,5,13,5,13,5,13,5,13,5,13,5,
%U 13,5,13,5,13,5,13,5,13,5,13,5,13,5,13,5,13,5,13,5,13,5,13,5,13,5,13,5,13,5
%N Group the natural numbers with at least two members in each group such that the n-th group sum is a multiple of n. (1,2),(3,4,5,),(6,7,8),(9,10,11,12,13,14,15),(16,17,18,19),(20,21,22,23,24,25,26,27,28),(29,30,31,32,33,34),... Sequence contains the number of members in the n-th group.
%C The condition 'at least two terms' is imposed to avoid the trivial grouping (1),(2),(3),(4),(5),...
%Y Cf. A088099, A088101.
%K nonn
%O 1,1
%A _Amarnath Murthy_, Sep 24 2003
%E More terms from _Ray Chandler_, Oct 13 2003
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