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A309557 as a simple table

na(n)
02
15
23
38
48
54
611
713
811
95
1014
1118
1218
1314
146
1517
1623
1725
1823
1917
207
2120
2228
2332
2432
2528
2620
278
2823
2933
3039
3141
3239
3333
3423
359
3626
3738
3846
3950
4050
4146
4238
4326
4410
4529
4643
4753
4859
4961
5059
5153
5243
5329
5411
5532
5648
5760
5868
5972
6072
6168
6260
6348
6432
6512
6635
6753
6867
6977
7083
7185
7283
7377
7467
7553
7635
7713

[2,5,3,8,8,4,11,13,11,5,14,18,18,14,6,17,23,25,23,
 17,7,20,28,32,32,28,20,8,23,33,39,41,39,33,23,9,
 26,38,46,50,50,46,38,26,10,29,43,53,59,61,59,53,
 43,29,11,32,48,60,68,72,72,68,60,48,32,12,35,53,
 67,77,83,85,83,77,67,53,35,13]