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A328921 as a simple table

na(n)
01
12
21
320
48
51
6592
7240
836
92
1033888
1114208
122400
13192
146
153134208
161355520
17248640
1824000
191200
2024
21423974400
22188052480
2336599040
243978240
25252000
268640
27120
2878722795520
2935613849600
307240020480
31853977600
3262657280
332822400
3470560
35720
3619193652817920
378816953098240
381851920179200

[1,2,1,20,8,1,592,240,36,2,33888,14208,2400,192,6,
 3134208,1355520,248640,24000,1200,24,423974400,
 188052480,36599040,3978240,252000,8640,120,
 78722795520,35613849600,7240020480,853977600,
 62657280,2822400,70560,720,19193652817920,
 8816953098240,1851920179200]