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A000305 as a simple table

na(n)
11
24
318
489
5466
62537
714209
881316
9473338
102793454
1116674417
12100487896
13610549829
143735850007
1523000055178
16142370597601
17885521350882
185531501612071
1934686798239678
20218273864005214
211377897874711437

[1,4,18,89,466,2537,14209,81316,473338,2793454,
 16674417,100487896,610549829,3735850007,
 23000055178,142370597601,885521350882,
 5531501612071,34686798239678,218273864005214,
 1377897874711437]