%I #14 Oct 16 2020 19:30:07
%S 1,2,4,7,13,25,50,98,186,366,739,1457,2822,5589,11258,22304,43629,
%T 86658,174257,346180,680955,1354829,2721296,5414787,10689261,21290468,
%U 42730228,85112982,168430866,335726276,673421519,1342347992,2661053796,5307062034,10640664164
%N Number of subsets of {1..n} containing n whose sum is greater than or equal to the sum of their complement.
%H Fausto A. C. Cariboni, <a href="/A326174/b326174.txt">Table of n, a(n) for n = 1..46</a>
%e The a(1) = 1 through a(5) = 13 subsets:
%e {1} {2} {3} {1,4} {3,5}
%e {1,2} {1,3} {2,4} {4,5}
%e {2,3} {3,4} {1,2,5}
%e {1,2,3} {1,2,4} {1,3,5}
%e {1,3,4} {1,4,5}
%e {2,3,4} {2,3,5}
%e {1,2,3,4} {2,4,5}
%e {3,4,5}
%e {1,2,3,5}
%e {1,2,4,5}
%e {1,3,4,5}
%e {2,3,4,5}
%e {1,2,3,4,5}
%t Table[Length[Select[Subsets[Range[n]],MemberQ[#,n]&&Plus@@#>=Plus@@Complement[Range[n],#]&]],{n,10}]
%Y Cf. A053632, A057567, A057568, A059529, A063865, A326152, A326173, A326175.
%K nonn
%O 1,2
%A _Gus Wiseman_, Jun 11 2019
%E a(21)-a(42) from _Bert Dobbelaere_, Jun 22 2019
|