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A002568 as a simple table

na(n)
11
24
31
416
516
6120
78
8728
992
108
112
12840
1324
14436
1510188
16128
1712
18224
198424
20312
2172
22192
238784
24368
2556
26224
2714500
28280
2910880
30240

[1,4,1,16,16,120,8,728,92,8,2,840,24,436,10188,
 128,12,224,8424,312,72,192,8784,368,56,224,14500,
 280,10880,240]