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A220320 as a simple table

na(n)
14
235
3243
41887
515189
6116448
7909903
87061662
954764410
10425003183
113295808062
1225561278738
13198233289265
141537281767263
1511921547738532
1692449984931302
17716936108446899
185559728723273092
1943114791778783459
20334348143414517835

[4,35,243,1887,15189,116448,909903,7061662,
 54764410,425003183,3295808062,25561278738,
 198233289265,1537281767263,11921547738532,
 92449984931302,716936108446899,5559728723273092,
 43114791778783459,334348143414517835]