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A323389 as a simple table

na(n)
01
12
25
319
488
5553
64619
749137
8646815
910053183
10178725865
113555840644
1278048875298
131871066903575
1448617053973267
151360733669185473
1640810827325698897
171305690378666580997
1844387116312631271929
191597768080980647428027
2060710507893875818581964

[1,2,5,19,88,553,4619,49137,646815,10053183,
 178725865,3555840644,78048875298,1871066903575,
 48617053973267,1360733669185473,40810827325698897,
 1305690378666580997,44387116312631271929,
 1597768080980647428027,60710507893875818581964]