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A248699 as a simple table

na(n)
02
11
25
35
46
57
610
79
812
912
1014
1115
1217
1316
1420
1520
1621
1722
1825
1924
2027
2127
2229
2330
2432
2531
2635
2735
2836
2937
3040
3139
3242
3342
3444
3545
3647
3746
3850
3950
4051
4152
4255
4354
4457
4557
4659
4760
4862
4961
5065
5165
5266
5367
5470
5569
5672
5772
5874
5975
6077
6176
6280
6380
6481
6582
6685

[2,1,5,5,6,7,10,9,12,12,14,15,17,16,20,20,21,22,
 25,24,27,27,29,30,32,31,35,35,36,37,40,39,42,42,
 44,45,47,46,50,50,51,52,55,54,57,57,59,60,62,61,
 65,65,66,67,70,69,72,72,74,75,77,76,80,80,81,82,
 85]