A270054 - OEIS

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A270054 as a simple table

n	a(n)
1	240
2	99840
3	22911300
4	4410058320
5	779206497960
6	130850370606120
7	21244602958557060
8	3367363526042121600
9	524230216822482202860
10	80480015854082855624040
11	12218158166851049001563640

[240,99840,22911300,4410058320,779206497960, 130850370606120,21244602958557060, 3367363526042121600,524230216822482202860, 80480015854082855624040, 12218158166851049001563640]