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A008642 as a simple table

na(n)
01
11
22
32
44
54
66
76
89
99
1012
1112
1216
1316
1420
1520
1625
1725
1830
1930
2036
2136
2242
2342
2449
2549
2656
2756
2864
2964
3072
3172
3281
3381
3490
3590
36100
37100
38110
39110
40121
41121
42132
43132
44144
45144
46156
47156
48169
49169
50182
51182
52196
53196
54210
55210
56225
57225

[1,1,2,2,4,4,6,6,9,9,12,12,16,16,20,20,25,25,30,
 30,36,36,42,42,49,49,56,56,64,64,72,72,81,81,90,
 90,100,100,110,110,121,121,132,132,144,144,156,
 156,169,169,182,182,196,196,210,210,225,225]