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A050231 as a simple table

na(n)
10
20
31
43
58
620
747
8107
9238
10520
111121
122391
135056
1410616
1522159
1646023
1795182
18196132
19402873
20825259
211686408
223438828
236999071
2414221459
2528853662
2658462800
27118315137
28239186031
29483072832
30974791728
311965486047

[0,0,1,3,8,20,47,107,238,520,1121,2391,5056,10616,
 22159,46023,95182,196132,402873,825259,1686408,
 3438828,6999071,14221459,28853662,58462800,
 118315137,239186031,483072832,974791728,
 1965486047]