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A251908 as a simple table

na(n)
1910694
231829596
31346875728
455159959296
52346358649878
6101807826393734
74420398895384686
8192602542367733540
98418267573435319288
10368433628593845084758
1116142671439953491545132
12707955307957030465592450

[910694,31829596,1346875728,55159959296,
 2346358649878,101807826393734,4420398895384686,
 192602542367733540,8418267573435319288,
 368433628593845084758,16142671439953491545132,
 707955307957030465592450]