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A067685 as a simple table

na(n)
11
28
365
496
5224
6560
76734
811648
93588320
1067969536
11290575208
121629860960
134758938912
1410769110400

[1,8,65,96,224,560,6734,11648,3588320,67969536,
 290575208,1629860960,4758938912,10769110400]