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A050477
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C(n)*(7n+1) where C(n)=Catalan numbers (A000108).
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0
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1, 8, 30, 110, 406, 1512, 5676, 21450, 81510, 311168, 1192516, 4585308, 17681020, 68346800, 264769560, 1027653570, 3995416710, 15557374800, 60660114900, 236813267460, 925540979220
(list; graph; refs; listen; history; internal format)
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