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A023425
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Generalized Catalan Numbers.
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0
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1, 1, 1, 1, 1, 2, 5, 13, 34, 90, 241, 652, 1780, 4899, 13581, 37893, 106340, 299978, 850187, 2419788, 6913658, 19822439, 57015620, 164476023, 475752469, 1379553027, 4009532279
(list; graph; refs; listen; history; internal format)
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