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A021824 as a simple table

na(n)
01
120
2267
33010
431073
5304920
62901319
727075950
8249555405
92281579300
1020749095731
11188036746170
121700122392697
1315347941075760
14138412864844703
151247405586235270
1611236794818538149
17101192043527859900

[1,20,267,3010,31073,304920,2901319,27075950,
 249555405,2281579300,20749095731,188036746170,
 1700122392697,15347941075760,138412864844703,
 1247405586235270,11236794818538149,
 101192043527859900]