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A251426 as a simple table

na(n)
161
2725
35097
444465
5349257
62647405
719285211
8137949185
9976032575
106871688649
1148247321093
12338304918133
132370405542621
1416602202832585
15116254396792509
16813946050011849
175698326553998227
1839891307203318801

[61,725,5097,44465,349257,2647405,19285211,
 137949185,976032575,6871688649,48247321093,
 338304918133,2370405542621,16602202832585,
 116254396792509,813946050011849,5698326553998227,
 39891307203318801]