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A238531 as a simple table

na(n)
01
11
23
35
48
512
617
723
830
938
1047
1157
1268
1380
1493
15107
16122
17138
18155
19173
20192
21212
22233
23255
24278
25302
26327
27353
28380
29408
30437
31467
32498
33530
34563
35597
36632
37668
38705
39743
40782
41822
42863
43905
44948
45992
461037
471083
481130
491178
501227
511277
521328
531380

[1,1,3,5,8,12,17,23,30,38,47,57,68,80,93,107,122,
 138,155,173,192,212,233,255,278,302,327,353,380,
 408,437,467,498,530,563,597,632,668,705,743,782,
 822,863,905,948,992,1037,1083,1130,1178,1227,1277,
 1328,1380]