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A247589 as a simple table

na(n)
10
20
31
41
52
64
75
87
910
1012
1115
1217
1321
1425
1529
1633
1737
1842
1948
2053
2158
2265
2371
2476
2583
2691
27100
28106
29113
30122
31130
32140
33149
34158
35169
36177
37188
38197
39210
40221
41230
42243
43255
44269
45281
46292
47306
48318
49333
50346

[0,0,1,1,2,4,5,7,10,12,15,17,21,25,29,33,37,42,48,
 53,58,65,71,76,83,91,100,106,113,122,130,140,149,
 158,169,177,188,197,210,221,230,243,255,269,281,
 292,306,318,333,346]