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A209740 as a simple table

na(n)
115
2700
3103373
420611956
54474325828
6991613495404
7220845828478730
849242046909442868
910982471712866182098
102449579228342732267816
11546373088082223670747386
12121867698385924682716244064

[15,700,103373,20611956,4474325828,991613495404,
 220845828478730,49242046909442868,
 10982471712866182098,2449579228342732267816,
 546373088082223670747386,
 121867698385924682716244064]