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A060050 as a simple table

na(n)
20
31
40
50
61
71
85
913
1046
11155
12561
132068
147871
1530586
16121391
17490196
182011422
198370698
2035285987
21150485667
22648653910
232823402675
2412400659846
2554920758496
26245126368841
271101983749921
284987538210079
2922716326086134

[0,1,0,0,1,1,5,13,46,155,561,2068,7871,30586,
 121391,490196,2011422,8370698,35285987,150485667,
 648653910,2823402675,12400659846,54920758496,
 245126368841,1101983749921,4987538210079,
 22716326086134]