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A181320 as a simple table

na(n)
01
11
21
32
47
55
66
748
891
949
1024
11360
121304
131697
14729
15120
163000
1717910
1841440
1941051
2014641
21720
2227720
23249900
24899730
251524282
261218745
27371293

[1,1,1,2,7,5,6,48,91,49,24,360,1304,1697,729,120,
 3000,17910,41440,41051,14641,720,27720,249900,
 899730,1524282,1218745,371293]