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A008465
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2^(2n-6) . C(n,3) - 2^(n-2) . C(n,4).
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0
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1, 12, 120, 1040, 7840, 52864, 327936, 1912320, 10644480, 57164800, 298428416, 1522626560, 7622451200, 37551144960, 182458122240, 875972788224, 4161315274752, 19583780782080, 91393766195200
(list; graph; refs; listen; history; internal format)
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