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A340648 as a simple table

na(n)
00
11
23
36
411
518
626
735
846
959
1073
1188
12105
13124
14144
15165
16188
17213
18239
19266
20295
21326
22358
23391
24426
25463
26501
27540
28581
29624
30668
31713
32760
33809
34859
35910
36963
371018
381074
391131
401190
411251
421313
431376
441441
451508
461576
471645
481716
491789
501863
511938
522015

[0,1,3,6,11,18,26,35,46,59,73,88,105,124,144,165,
 188,213,239,266,295,326,358,391,426,463,501,540,
 581,624,668,713,760,809,859,910,963,1018,1074,
 1131,1190,1251,1313,1376,1441,1508,1576,1645,1716,
 1789,1863,1938,2015]