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A239334 as a simple table

na(n)
15
231
3172
4926
55078
627861
7152260
8832207
94550810
1024881731
11136029644
12743697760
134065948624
1422229220072
15121530709245
16664428372582
173632538661095
1819859679158791
19108576093277449
20593603153333233

[5,31,172,926,5078,27861,152260,832207,4550810,
 24881731,136029644,743697760,4065948624,
 22229220072,121530709245,664428372582,
 3632538661095,19859679158791,108576093277449,
 593603153333233]