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A072975
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a(n)=2^n*binomial(3*n,n)*(3*n+1).
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0
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1, 24, 420, 6720, 102960, 1537536, 22573824, 327444480, 4707014400, 67190323200, 953748956160, 13476348887040, 189694258790400, 2661556369489920, 37240665709608960, 519828326870679552
(list; graph; refs; listen; history; internal format)
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