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A020668 as a simple table

na(n)
10
21
34
45
58
69
713
816
917
1020
1125
1229
1332
1436
1537
1640
1741
1845
1949
2052
2153
2261
2364
2465
2568
2672
2773
2880
2981
3085
3189
3297
33100
34101
35104
36109
37113
38116
39117
40121
41125
42128
43136
44137
45144
46145
47148
48149
49153
50157
51160
52164
53169
54173
55180
56181
57185
58193
59196
60197
61200
62205
63208

[0,1,4,5,8,9,13,16,17,20,25,29,32,36,37,40,41,45,
 49,52,53,61,64,65,68,72,73,80,81,85,89,97,100,101,
 104,109,113,116,117,121,125,128,136,137,144,145,
 148,149,153,157,160,164,169,173,180,181,185,193,
 196,197,200,205,208]