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A147664 as a simple table

na(n)
01
11
23
315
4100
5801
67296
773174
8791751
99116613
10110640310
111405349658
1218585016509
13254855278565
143612425924919
1552793266545585
16793851646358364
1712261570084250926
18194260753173421656
193153098224666860712

[1,1,3,15,100,801,7296,73174,791751,9116613,
 110640310,1405349658,18585016509,254855278565,
 3612425924919,52793266545585,793851646358364,
 12261570084250926,194260753173421656,
 3153098224666860712]