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A339524 as a simple table

na(n)
10
21
31
42
53
68
718
849
9120
10313
11802
122120
135591
1414942
1540033
16108108
17293094
18798839
192185341
206002085
2116538599
2245716952
23126727195
24352215812
25981268481
262739930091
277666333161
2821491833976
2960358490615
30169798048026
31478420333601

[0,1,1,2,3,8,18,49,120,313,802,2120,5591,14942,
 40033,108108,293094,798839,2185341,6002085,
 16538599,45716952,126727195,352215812,981268481,
 2739930091,7666333161,21491833976,60358490615,
 169798048026,478420333601]