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A155389 as a simple table

na(n)
41
54
610
719
834
964
10213
111157
126478
1333461
14167462
15890029
166064749
1755393044
18595987834
196995484146
2087602949947

[1,4,10,19,34,64,213,1157,6478,33461,167462,
 890029,6064749,55393044,595987834,6995484146,
 87602949947]