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A343985 as a simple table

na(n)
10
21
31
44
54
66
79
810
910
1012
1114
1216
1319
1420
1521
1622
1722
1824
1926
2028
2130
2232
2334
2436
2539
2640
2741
2842
2943
3044
3145
3246
3346
3448
3550
3652
3754
3856
3958
4060
4162
4264
4366
4468
4570
4672
4774
4876
4979
5080
5181
5282
5383
5484
5585
5686
5787
5888
5989
6090
6191
6292
6393
6494
6594
6696

[0,1,1,4,4,6,9,10,10,12,14,16,19,20,21,22,22,24,
 26,28,30,32,34,36,39,40,41,42,43,44,45,46,46,48,
 50,52,54,56,58,60,62,64,66,68,70,72,74,76,79,80,
 81,82,83,84,85,86,87,88,89,90,91,92,93,94,94,96]