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A002574 as a simple table

na(n)
10
20
31
41
52
64
77
813
924
1042
1176
12137
13245
14441
15792
161420
172550
184576
198209
2014732
2126433
2247424
2385092
24152670
25273914
26491453
27881744
281581985
292838333
305092398
319136528
3216392311
3329410243
3452766343
3594670652
36169853138
37304741614
38546751437
39980952673
401759973660

[0,0,1,1,2,4,7,13,24,42,76,137,245,441,792,1420,
 2550,4576,8209,14732,26433,47424,85092,152670,
 273914,491453,881744,1581985,2838333,5092398,
 9136528,16392311,29410243,52766343,94670652,
 169853138,304741614,546751437,980952673,
 1759973660]