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A037956
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C(n,[ (n-4)/2 ]).
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3
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0, 0, 0, 0, 1, 1, 6, 7, 28, 36, 120, 165, 495, 715, 2002, 3003, 8008, 12376, 31824, 50388, 125970, 203490, 497420, 817190, 1961256, 3268760, 7726160, 13037895, 30421755, 51895935, 119759850, 206253075
(list; graph; refs; listen; history; internal format)
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