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A173691 as a simple table

na(n)
00
10
21
33
46
510
616
724
835
949
1066
1186
12110
13138
14171
15209
16252
17300
18354
19414
20481
21555
22636
23724
24820
25924
261037
271159
281290
291430
301580
311740
321911
332093
342286
352490
362706
372934
383175
393429
403696
413976
424270
434578
444901
455239
465592
475960
486344
496744
507161

[0,0,1,3,6,10,16,24,35,49,66,86,110,138,171,209,
 252,300,354,414,481,555,636,724,820,924,1037,1159,
 1290,1430,1580,1740,1911,2093,2286,2490,2706,2934,
 3175,3429,3696,3976,4270,4578,4901,5239,5592,5960,
 6344,6744,7161]