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A075303 as a simple table

na(n)
00
12
21
35
43
54
66
79
810
97
1015
118
1221
1311
1428
1514
1636
1716
1845
1912
2055
2122
2266
2313
2478
2529
2691
2717
28105
2937
30120
3120
32136
3346
34153
3523
36171
3756
38190
3918
40210
4167
42231
4330
44253
4579
46276
4719
48300
4992
50325
5138
52351
53106
54378
5524
56406
57121
58435
5947
60465
61137
62496
6327
64528

[0,2,1,5,3,4,6,9,10,7,15,8,21,11,28,14,36,16,45,
 12,55,22,66,13,78,29,91,17,105,37,120,20,136,46,
 153,23,171,56,190,18,210,67,231,30,253,79,276,19,
 300,92,325,38,351,106,378,24,406,121,435,47,465,
 137,496,27,528]