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A279400 as a simple table

na(n)
13
23
34
45
56
66
77
87
97
1010
119
129
139
1410
1510
1610
1712
1812
1913
2013
2113
2214
2314
2414
2514
2616
2717
2816
2915
3017
3117
3216
3318
3419
3519
3619
3718
3820
3920
4021
4121
4221
4321
4422
4522
4622
4722
4822
4923
5023

[3,3,4,5,6,6,7,7,7,10,9,9,9,10,10,10,12,12,13,13,
 13,14,14,14,14,16,17,16,15,17,17,16,18,19,19,19,
 18,20,20,21,21,21,21,22,22,22,22,22,23,23]