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A060900 as a simple table

na(n)
01
12
27
321
478
5260
6988
73458
813300
947880
10185535
11680295
122649570
139841260
1438470380
15144263925
16565514586
172136388436
188392954570
1931893227366
20125515281892
21479240167224
221888770070824
237240285271492
2428569774314536
25109883747363600
26434040802086220

[1,2,7,21,78,260,988,3458,13300,47880,185535,
 680295,2649570,9841260,38470380,144263925,
 565514586,2136388436,8392954570,31893227366,
 125515281892,479240167224,1888770070824,
 7240285271492,28569774314536,109883747363600,
 434040802086220]