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A028218 as a simple table

na(n)
01
138
2913
317738
4304549
54824806
672271081
71039149506
814486436877
9197162419454
102632865400529
1134623882428954
12449653998040885
135779288950415382
1473637791767193657
15931419802216938482

[1,38,913,17738,304549,4824806,72271081,
 1039149506,14486436877,197162419454,2632865400529,
 34623882428954,449653998040885,5779288950415382,
 73637791767193657,931419802216938482]