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A036389 as a simple table

na(n)
10
20
31
44
512
630
769
8150
9317
10659
111361
122784
135686
1411557
1523445
1647472
1795991
18193891
19391266
20788979
211589856
223201863
236445059
2412967425
2526080302
2652434693
27105386552
28211751544
29425359720
30854245385
311715204991

[0,0,1,4,12,30,69,150,317,659,1361,2784,5686,
 11557,23445,47472,95991,193891,391266,788979,
 1589856,3201863,6445059,12967425,26080302,
 52434693,105386552,211751544,425359720,854245385,
 1715204991]