Search: id:A160275
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%I A160275
%S A160275 1,5,15,15,30,210,1050,6300,1045800,13756453200,67826316310678800,
%T A160275 8622353329220210792550912000,
%U A160275 92206830102396929163916671718833533307592704000
%N A160275 Partition of positive numbers into shortest possible groups (1), (2,3), 
               (4,5,6), (7,8), ... such that a(n) = the sum of the terms of the 
               n-th group is a multiple of a(n-1).
%F A160275 a(n) = A000217(A160277(n)) - A000217(A160277(n-1))
%Y A160275 Cf. A160276 (ratios a(n)/a(n-1)), A160277 (last terms in the groups), 
               A075631, A079798.
%Y A160275 Sequence in context: A077348 A113259 A166621 this_sequence A015666 A045856 
               A102185
%Y A160275 Adjacent sequences: A160272 A160273 A160274 this_sequence A160276 A160277 
               A160278
%K A160275 nonn
%O A160275 1,2
%A A160275 Max Alekseyev (maxale(AT)gmail.com), May 08 2009

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