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A106361
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Number of rooted ordered trees where no branch is identical to its adjacent neighbor.
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2
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1, 1, 1, 3, 6, 16, 45, 128, 371, 1106, 3343, 10230, 31635, 98714, 310366, 982437, 3128051, 10011848, 32193840, 103955571, 336946034, 1095873115, 3575319049, 11697938232, 38374479841, 126190075741, 415889689954, 1373506798548
(list; graph; refs; listen; history; internal format)
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