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A167557 as a simple table

na(n)
11
21
34
42
512
632
76
848
9160
10384
1124
12240
13960
142688
156144
16120
171440
186720
1921504
2055296
21122880
22720
2310080
2453760
25193536
26552960
271351680
282949120
295040
3080640
31483840
321935360
336082560
3416220160
3538338560
3682575360

[1,1,4,2,12,32,6,48,160,384,24,240,960,2688,6144,
 120,1440,6720,21504,55296,122880,720,10080,53760,
 193536,552960,1351680,2949120,5040,80640,483840,
 1935360,6082560,16220160,38338560,82575360]