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A221143 as a simple table

na(n)
10
20
30
40
51
611
766
8287
91013
103081
118372
1220824
1348192
14105117
15217945
16433017
17828346
181534271
192759132
204837638
218283014
2213894554
2322856717
2436968045
2558818578
2692258215
27142699970
28218041302
29329162610
30491683915
31726746512
321064266795
331544134041

[0,0,0,0,1,11,66,287,1013,3081,8372,20824,48192,
 105117,217945,433017,828346,1534271,2759132,
 4837638,8283014,13894554,22856717,36968045,
 58818578,92258215,142699970,218041302,329162610,
 491683915,726746512,1064266795,1544134041]