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A194180 as a simple table

na(n)
10
20
31
43
55
68
712
816
921
1027
1133
1240
1347
1455
1564
1673
1783
1894
19105
20116
21128
22141
23154
24168
25182
26197
27213
28229
29245
30262
31279
32297
33316
34335
35354
36374
37394
38415
39437
40459
41481
42504
43527
44551
45575
46600
47625
48651
49677
50703
51730
52757
53784
54812
55840

[0,0,1,3,5,8,12,16,21,27,33,40,47,55,64,73,83,94,
 105,116,128,141,154,168,182,197,213,229,245,262,
 279,297,316,335,354,374,394,415,437,459,481,504,
 527,551,575,600,625,651,677,703,730,757,784,812,
 840]