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A046166 as a simple table

na(n)
10
20
30
40
51
6171
717066
81298346
983384427
104762648737
11249485204452
1212226539786912
13568267449522773
1425296121946918823
151086375882592194558
1645264846407024660598
171837809636559394481439
1872965749033508656346829

[0,0,0,0,1,171,17066,1298346,83384427,4762648737,
 249485204452,12226539786912,568267449522773,
 25296121946918823,1086375882592194558,
 45264846407024660598,1837809636559394481439,
 72965749033508656346829]