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A316313 Number of integer partitions of n such that every distinct submultiset has a different average. 45

%I #5 Jun 30 2018 20:40:29

%S 1,1,2,2,3,3,5,6,6,9,11,10,15,17,18,22,28,26,34,37,44,50,61,53,77,82,

%T 93,89,120,120,149,138,174,180,222,193,257,262,305,281,367,359,424,

%U 398,487,507,590,526,662,666,782,729,894,892,995,987,1154,1188,1370

%N Number of integer partitions of n such that every distinct submultiset has a different average.

%C Note that such a partition is necessarily strict.

%e The a(8) = 6 integer partitions are (8), (71), (62), (53), (521), (431).

%t Table[Length[Select[IntegerPartitions[n],UnsameQ@@Mean/@Union[Subsets[#]]&]],{n,20}]

%Y Cf. A000009, A108917, A275972, A276024, A284640, A299702, A301899, A301900, A316271, A316314.

%K nonn

%O 1,3

%A _Gus Wiseman_, Jun 29 2018

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