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A261037 as a simple table

na(n)
11
21
33
44
57
610
717
823
936
1048
1173
1296
13140
14182
15259
16334
17463
18592
19806
201024
211370
221728
232281
242860
253727
264646
275991
287430
299487
3011706
3114822
3218205
3322870
3427966
3534890
3642492
3752670
3863896
3978743
4095178
41116659
42140516
43171380
44205750

[1,1,3,4,7,10,17,23,36,48,73,96,140,182,259,334,
 463,592,806,1024,1370,1728,2281,2860,3727,4646,
 5991,7430,9487,11706,14822,18205,22870,27966,
 34890,42492,52670,63896,78743,95178,116659,140516,
 171380,205750]