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%I #16 Dec 26 2022 04:36:10
%S 2,6,12,24,50,110,252,592,1410,3382,8140,19624,47346,114270,275836,
%T 665888,1607554,3880934,9369356,22619576,54608434,131836366,318281084,
%U 768398448,1855077890,4478554134,10812186060,26102926152,63018038258
%N Expansion of 2*x*(1+x)*(1-2*x)/((1-x)^2*(1-2*x-x^2)).
%F G.f.: 2*x*(1+x)*(1-2*x)/((1-x)^2*(1-2*x-x^2)). [_Colin Barker_, Feb 28 2012]
%K nonn,easy,less
%O 1,1
%A _Roger L. Bagula_, Jan 08 2008
%E Meaningful name from _Joerg Arndt_, Dec 26 2022
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