Search: id:A088142
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%I A088142
%S A088142 3,10,50,116,560,1730,6123,30122,116908,507277,2492737,15328119,
%T A088142 56182092,441156796,2093130576,15965840718,77353276330,693400983344,
%U A088142 3517825829117,35126205660152,187347585491624,1952969742765476
%N A088142 Number of partitions of n-set with 2 block sizes.
%F A088142 E.g.f.: (G(x)^2-H(x))/2 where G(x) = Sum {k>=1} (exp(x^k/k!)-1) and H(x) 
               = Sum {k>=1} (exp(x^k/k!)-1)^2. - Vladeta Jovovic (vladeta(AT)eunet.rs), 
               Sep 18 2007
%Y A088142 Cf. A005772, A038041, A002133.
%Y A088142 Sequence in context: A082426 A054381 A102088 this_sequence A049370 A009343 
               A048175
%Y A088142 Adjacent sequences: A088139 A088140 A088141 this_sequence A088143 A088144 
               A088145
%K A088142 nonn
%O A088142 3,1
%A A088142 Vladeta Jovovic (vladeta(AT)eunet.rs), Nov 02 2003

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