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A139008 as a simple table

na(n)
01
12
27
349
4648
516475
6801489
774700792
813333992705
94558747755857
102985167883475040
113743977846899435969
128993695705522239110137
1341379357418095833391759776
14364644672948881035681654421967

[1,2,7,49,648,16475,801489,74700792,13333992705,
 4558747755857,2985167883475040,
 3743977846899435969,8993695705522239110137,
 41379357418095833391759776,
 364644672948881035681654421967]