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A068488 as a simple table

na(n)
12
24
311
447
5344
617
78
869
966
1067
118028643011
1242
1318
1439
15162
1621
1759
1848
192311331257
20179
21369
222477
2323289
2432
25172011
2675668
27342
2835
2928757
30356411
31243
32297
33152

[2,4,11,47,344,17,8,69,66,67,8028643011,42,18,39,
 162,21,59,48,2311331257,179,369,2477,23289,32,
 172011,75668,342,35,28757,356411,243,297,152]