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Number of pointed trees on normal pointed multisets of weight n.
6

%I #10 Oct 04 2015 04:46:34

%S 1,3,34,615,15410,494018

%N Number of pointed trees on normal pointed multisets of weight n.

%C A pointed multiset is normal if its entries span an initial interval of positive integers.

%e The a(2) = 3 pointed trees are 1[1 1], 1[1 2], 2[1 2].

%e The a(3) = 34 pointed trees of the form rootpoint[pointedbranch ... pointedbranch] are:

%e 1[1 1[1 1]], 1[1[1 1] 1], 1[1 1 1],

%e 1[1 2[2 2]], 1[1[1 2] 2], 1[1 2 2],

%e 2[1 2[2 2]], 2[1[1 2] 2], 2[2 2[1 2]], 2[2[1 2] 2], 2[1 2 2],

%e 1[1 1[1 2]], 1[1 2[1 2]], 1[1[1 1] 2], 1[1[1 2] 1], 1[1 1 2],

%e 2[1 2[1 2]], 2[1[1 1] 2], 2[1 1 2],

%e 1[1 2[2 3]], 1[1 3[2 3]], 1[1[1 2] 3], 1[1[1 3] 2], 1[1 2 3],

%e 2[1 2[2 3]], 2[1[1 3] 2], 2[2 3[1 3]], 2[2[1 2] 3], 2[1 2 3],

%e 3[1 3[2 3]], 3[1[1 2] 3], 3[2 3[1 3]], 3[2[1 2] 3], 3[1 2 3].

%Y Cf. A053492, A052894, A262671.

%K nonn,more

%O 1,2

%A _Gus Wiseman_, Sep 26 2015