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A377900 as a simple table

na(n)
11
21
31
46
56
69
79
89
912
1012
1112
1215
1315
1415
1518
1618
1718
1821
1921
2021
2124
2224
2324
2426
2526
2628
2728
2832
2932
3032
3132
3234
3334
3436
3536
3639
3739
3839
3942
4042
4142
4245
4345
4445
4548
4648
4748
4850
4950
5052
5152
5255

[1,1,1,6,6,9,9,9,12,12,12,15,15,15,18,18,18,21,21,
 21,24,24,24,26,26,28,28,32,32,32,32,34,34,36,36,
 39,39,39,42,42,42,45,45,45,48,48,48,50,50,52,52,
 55]