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A118677
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Number of Motzkin paths of length n in 3D with no level steps at odd level.
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0
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1, 2, 6, 18, 60, 202, 718, 2600, 9748, 37270, 146058, 582548, 2367028, 9761890, 40844168, 173001018, 741193056, 3207480526, 14008373662, 61683982696, 273658651700, 1222314257450, 5493414465900, 24828463984518
(list; graph; refs; listen; history; internal format)
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