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A217420 as a simple table

na(n)
10
20
30
41
52
66
714
837
992
10239
11613
121607
134215
1411185
1529814
1680070
17216061
18586218
191597292
204370721
2112003163
2233077327
2391431425
24253454781
25704425087
261962537755
275479843060
2815332668869
2942983623237
30120716987723
31339595975795
32956840683968

[0,0,0,1,2,6,14,37,92,239,613,1607,4215,11185,
 29814,80070,216061,586218,1597292,4370721,
 12003163,33077327,91431425,253454781,704425087,
 1962537755,5479843060,15332668869,42983623237,
 120716987723,339595975795,956840683968]