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A156739 as a simple table

na(n)
01
11
21
31
4120
51
61
73060
83060
91
101
1138760
12988380
1338760
141
151
16319770
17103285710
18103285710
19319770
201
211
221961256
235226256926
2466199254396
255226256926
261961256
271
281
299657700
30157843517260
3116494647553670
3216494647553670
33157843517260
349657700
351

[1,1,1,1,120,1,1,3060,3060,1,1,38760,988380,38760,
 1,1,319770,103285710,103285710,319770,1,1,1961256,
 5226256926,66199254396,5226256926,1961256,1,1,
 9657700,157843517260,16494647553670,
 16494647553670,157843517260,9657700,1]