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A002578 as a simple table

na(n)
10
20
31
43
56
69
713
818
924
1031
1139
1247
1356
1466
1577
1689
17102
18115
19129
20144
21160
22177
23195
24213
25232
26252
27273
28295
29318
30341
31365
32390
33416
34443
35471
36499
37528
38558
39589
40621
41654
42687
43721
44756
45792
46829
47867
48905
49944
50984
511025
521067
531110

[0,0,1,3,6,9,13,18,24,31,39,47,56,66,77,89,102,
 115,129,144,160,177,195,213,232,252,273,295,318,
 341,365,390,416,443,471,499,528,558,589,621,654,
 687,721,756,792,829,867,905,944,984,1025,1067,
 1110]