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A222450 as a simple table

na(n)
10
20
32
47
510
623
764
8175
9400
10983
112498
126409
1315982
1440282
15102240
16260590
17662008
181685764
194301724
2010996863
2128122246
2271995471
23184507156
24473312401
251215008846
263121272497
278023924572
2820640895689
2953127720534
30136821537884

[0,0,2,7,10,23,64,175,400,983,2498,6409,15982,
 40282,102240,260590,662008,1685764,4301724,
 10996863,28122246,71995471,184507156,473312401,
 1215008846,3121272497,8023924572,20640895689,
 53127720534,136821537884]