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A001550 as a simple table

na(n)
03
16
214
336
498
5276
6794
72316
86818
920196
1060074
11179196
12535538
131602516
144799354
1514381676
1643112258
17129271236
18387682634
191162785756
203487832978
2110462450356
2231385253914
2394151567436
24282446313698
25847322163876

[3,6,14,36,98,276,794,2316,6818,20196,60074,
 179196,535538,1602516,4799354,14381676,43112258,
 129271236,387682634,1162785756,3487832978,
 10462450356,31385253914,94151567436,282446313698,
 847322163876]