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A318347 as a simple table

na(n)
18
211
321
429
562
6136
7279
8624
91344
102941
116444
1214202
1331437
1469791
15155037
16344892
17766957
181706073
193794544
208440354
2118771770
2241756133
2392878060
24206605597
25459593314
261022399772
272274386877
285059572712
2911255394242

[8,11,21,29,62,136,279,624,1344,2941,6444,14202,
 31437,69791,155037,344892,766957,1706073,3794544,
 8440354,18771770,41756133,92878060,206605597,
 459593314,1022399772,2274386877,5059572712,
 11255394242]