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A025020 as a simple table

na(n)
13
24
35
46
58
69
710
811
912
1013
1115
1216
1318
1419
1520
1621
1722
1824
1925
2026
2127
2228
2329
2430
2532
2633
2735
2836
2937
3038
3139
3240
3342
3443
3544
3645
3748
3850
3951
4052
4153
4254
4355
4456
4557
4658
4759
4860
4961
5063
5164
5265
5366
5467
5568
5669
5770
5872
5974
6075
6176
6277
6378
6480
6581
6683
6784
6885
6986
7087
7188
7290
7391
7492

[3,4,5,6,8,9,10,11,12,13,15,16,18,19,20,21,22,24,
 25,26,27,28,29,30,32,33,35,36,37,38,39,40,42,43,
 44,45,48,50,51,52,53,54,55,56,57,58,59,60,61,63,
 64,65,66,67,68,69,70,72,74,75,76,77,78,80,81,83,
 84,85,86,87,88,90,91,92]