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A159769
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Number of n-leaf binary trees that do not contain (((()())())(()(()()))) as a subtree.
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1
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1, 1, 2, 5, 14, 41, 124, 384, 1212, 3885, 12614, 41400, 137132, 457841, 1539150, 5205612, 17700450, 60473476, 207491052, 714668954, 2470156910, 8564900629, 29783782326, 103846841946, 362970362118, 1271546963124, 4463801464608
(list; graph; refs; listen; history; internal format)
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