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A266899 as a simple table

na(n)
01
12
25
39
414
519
624
733
840
950
1058
1172
1282
1399
14109
15127
16140
17159
18173
19197
20214
21241
22256
23284
24303
25336
26350
27389
28411
29446
30470
31506
32532
33572
34596
35646
36673
37715
38747
39795
40825
41882
42911
43967
441003
451061
461099
471157
481191
491261
501293
511361
521406

[1,2,5,9,14,19,24,33,40,50,58,72,82,99,109,127,
 140,159,173,197,214,241,256,284,303,336,350,389,
 411,446,470,506,532,572,596,646,673,715,747,795,
 825,882,911,967,1003,1061,1099,1157,1191,1261,
 1293,1361,1406]