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A114310
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(n-1)!*(n!-n*(n-1)/2).
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1
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1, 1, 6, 108, 2640, 84600, 3613680, 203071680, 14629870080, 1316802614400, 144849884256000, 19120208432371200, 2982752889071155200, 542861032044198067200, 114000816839126241024000, 27360196043430269859840000, 7441973323852870393823232000, 2277243837099794643157389312000
(list; graph; refs; listen; history; internal format)
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