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A328990 as a simple table

na(n)
12
27
319
448
5118
6287
7695
81680
94058
109799
1123659
1257120
13137902
14332927
15803759
161940448
174684658
1811309767
1927304195
2065918160
21159140518
22384199199
23927538919
242239277040
255406093002
2613051463047
2731509019099
2876069501248
29183648021598
30443365544447

[2,7,19,48,118,287,695,1680,4058,9799,23659,57120,
 137902,332927,803759,1940448,4684658,11309767,
 27304195,65918160,159140518,384199199,927538919,
 2239277040,5406093002,13051463047,31509019099,
 76069501248,183648021598,443365544447]