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A291979 as a simple table

na(n)
01
12
26
327
4167
51310
612394
7137053
81733325
924670114
10390204086
116789564639
12128884276179
132650516064222
1458701784670138
151392959655437473
1635257885037803417
17948208649740610466
1827000743345935785670
19811575543670852269347
2025677856392014665436799

[1,2,6,27,167,1310,12394,137053,1733325,24670114,
 390204086,6789564639,128884276179,2650516064222,
 58701784670138,1392959655437473,35257885037803417,
 948208649740610466,27000743345935785670,
 811575543670852269347,25677856392014665436799]