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A003771 as a simple table

na(n)
13
230
3198
41326
58886
659550
7399078
82674446
917922966
10120111870
11804937158
125394336366
1336150480246
14242264688990
151623551862438
1610880333659086
1772915231888726
18488645955902910
193274691227542918
2021945546680994606
21147069444311876406
22985595016821145630

[3,30,198,1326,8886,59550,399078,2674446,17922966,
 120111870,804937158,5394336366,36150480246,
 242264688990,1623551862438,10880333659086,
 72915231888726,488645955902910,3274691227542918,
 21945546680994606,147069444311876406,
 985595016821145630]