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A208638 as a simple table

na(n)
14
213
332
471
5150
6309
7628
81267
92546
105105
1110224
1220463
1340942
1481901
15163820
16327659
17655338
181310697
192621416
205242855
2110485734
2220971493
2341943012
2483886051
25167772130
26335544289
27671088608
281342177247
292684354526
305368709085

[4,13,32,71,150,309,628,1267,2546,5105,10224,
 20463,40942,81901,163820,327659,655338,1310697,
 2621416,5242855,10485734,20971493,41943012,
 83886051,167772130,335544289,671088608,1342177247,
 2684354526,5368709085]